Merge pull request #99 from terminalforlife/master

More Comments & Code Tweaks & Additions

sheets/MegaCli

@@ -1,5 +1,5 @@
 # MegaCli introduced by LSI as a command line administration of LSI MegaRaid controllers.
-# With megacli we can create physical raids, gather info about raids and monitor raids. 
+# With megacli we can create physical raids, gather info about raids and monitor raids.
 
 # Install MegaCLI
 yum install MegaCli # CentOS

sheets/_cpp/func

@@ -1,29 +1,28 @@
-// ### Functions 
-// a simple function 
+// ### Functions
+// a simple function
 void functionName() {}
 
 // function with parameters of integers
 void functionName(int param1, int param2) {}
 
-// return type declaration 
-int functionName() { 
+// return type declaration
+int functionName() {
     return 420;
 }
 
-// Return multiple values at once 
+// Return multiple values at once
 // (C++ uses pairs [ 2 values ] and tuple [ more than 2 values ])
 // Please refer pairs and tuple respectively for more information
 std::tuple<double, double> functionName() {
-	return std::make_tuple( double1, double2 );
+    return std::make_tuple( double1, double2 );
 }
 
 pair<double,double> result = functionName();
 std::cout << result.first << std::endl;
 std::cout << result.second << std::endl;
 
-// Pass by reference (the caller and the callee use the same variable for the parameter) 
+// Pass by reference (the caller and the callee use the same variable for the parameter)
 int functionName(int &referenceName) {}
 
 // Pass by value (the caller and callee have two independent variables with the same value)
 int functionName(int valueName) {}
-

sheets/_cpp/hello

@@ -7,7 +7,7 @@
 
 // To Compile w/ specific executable name: g++ my_script.cpp -o my.executable
 // To Execute: ./my.executable
-int main() { 
+int main() {
     std::cout << "Hello" << endl;
     return 0;
 }

sheets/_cpp/pointers

@@ -1,8 +1,15 @@
-int *int_Ptr;     		// Declare a pointer variable called iPtr pointing to an int (an int pointer)
-                		// It contains an address. That address holds an int value.
-double *double_Ptr;  	// Declare a pointer of type double.
+// Declare a pointer variable called iPtr pointing to an int (an int pointer)
+// It contains an address. That address holds an int value.
+int *int_Ptr;
 
-int a = 5;				// Initializes a to the integer value 5 
-int *int_Ptr = &a		// Set int_Ptr which is an int pointer to the address of a
-std::cout << int_Ptr;	// Returns the address of a 
-std::cout << *int_Ptr;	// Returns 5 because it dereference the pointer to retrieve the value of a.
+// Declare a pointer of type double.
+double *double_Ptr;
+
+// Initializes a to the integer value 5
+int a = 5;
+// Set int_Ptr which is an int pointer to the address of `a`.
+int *int_Ptr = &a
+// Returns the address of `a`.
+std::cout << int_Ptr;
+// Returns 5 because it dereference the pointer to retrieve the value of `a`.
+std::cout << *int_Ptr;

sheets/_elm/hello

@@ -2,12 +2,12 @@
 #   Go to http://elm-lang.org/install
 #   and download the appropriate installer for your system.
 # To create a project:
-#	mkdir hello
-#	cd hello
-#	elm package install elm-lang/html
+#    mkdir hello
+#    cd hello
+#    elm package install elm-lang/html
 # after that create Hello.elm in this directory
 # To start:
-#	elm reactor        
+#    elm reactor
 # Read more here:
 #   https://www.elm-tutorial.org/en/01-foundations/01-hello.html
 module Hello exposing (..)

sheets/_go/Axioms

@@ -21,6 +21,6 @@ c <- 1
 c <- 2
 close(c)
 for i := 0; i < 3; i++ {
-    fmt.Printf("%d ", <-c) 
+    fmt.Printf("%d ", <-c)
 }
 // 1 2 0

sheets/_go/Channels

@@ -3,7 +3,7 @@ ch <- 42             // Send a value to the channel ch.
 v := <-ch            // Receive a value from ch
 
 // Create a buffered channel.
-// Writing to a buffered channels does not block 
+// Writing to a buffered channels does not block
 // if less than <buffer size> unread values have been written.
 ch := make(chan int, 100)
 // Non-buffered channels block.

sheets/_go/Pointers

@@ -4,4 +4,4 @@ r := &Vertex{1, 2} // r is also a pointer to a Vertex
 
 // The type of a pointer to a Vertex is *Vertex
 // new creates a pointer to a new struct instance
-var s *Vertex = new(Vertex) 
+var s *Vertex = new(Vertex)

sheets/_go/Structs

@@ -34,5 +34,5 @@ func (v *Vertex) add(n float64) {
 // **Anonymous structs:**  
 // Cheaper and safer than using `map[string]interface{}`.
 point := struct {
-	X, Y int
+    X, Y int
 }{1, 2}

sheets/_go/func

@@ -66,19 +66,19 @@ func outer() (func() int, int) {
 
 // ### Variadic Functions
 func main() {
-	fmt.Println(adder(1, 2, 3)) 	// 6
-	fmt.Println(adder(9, 9))	// 18
-	
-	nums := []int{10, 20, 30}
-	fmt.Println(adder(nums...))	// 60
+    fmt.Println(adder(1, 2, 3))     // 6
+    fmt.Println(adder(9, 9))    // 18
+
+    nums := []int{10, 20, 30}
+    fmt.Println(adder(nums...))    // 60
 }
 // By using ... before the type name of the last parameter you can indicate that it takes zero or more of those parameters.
 // The function is invoked like any other function except we can pass as many arguments as we want.
 func adder(args ...int) int {
-	total := 0
-	for _, v := range args { // Iterates over the arguments whatever the number.
-		total += v
-	}
-	return total
+    total := 0
+    for _, v := range args { // Iterates over the arguments whatever the number.
+        total += v
+    }
+    return total
 }
 

sheets/_go/go

@@ -1,4 +1,4 @@
-// Goroutines are lightweight threads (managed by Go, not OS threads). 
+// Goroutines are lightweight threads (managed by Go, not OS threads).
 // `go f(a, b)` starts a new goroutine which runs `f` (given `f` is a function).
 //
 // just a function (which can be later started as a goroutine)

sheets/_go/if

@@ -1,23 +1,23 @@
 func main() {
-	// Basic one
-	if x > 0 {
-		return x
-	} else {
-		return -x
-	}
-    	
-	// You can put one statement before the condition
-	if a := b + c; a < 42 {
-		return a
-	} else {
-		return a - 42
-	}
+    // Basic one
+    if x > 0 {
+        return x
+    } else {
+        return -x
+    }
+        
+    // You can put one statement before the condition
+    if a := b + c; a < 42 {
+        return a
+    } else {
+        return a - 42
+    }
     
-	// Type assertion inside if
-	var val interface{}
-	val = "foo"
-	if str, ok := val.(string); ok {
-		fmt.Println(str)
-	}
+    // Type assertion inside if
+    var val interface{}
+    val = "foo"
+    if str, ok := val.(string); ok {
+        fmt.Println(str)
+    }
 }
 

sheets/_go/slices

@@ -1,18 +1,28 @@
-var a []int                              // declare a slice - similar to an array, but length is unspecified
-var a = []int {1, 2, 3, 4}               // declare and initialize a slice (backed by the array given implicitly)
-a := []int{1, 2, 3, 4}                   // shorthand
-chars := []string{0:"a", 2:"c", 1: "b"}  // ["a", "b", "c"]
+// declare a slice - similar to an array, but length is unspecified
+var a []int
+// declare and initialize a slice (backed by the array given implicitly)
+var a = []int {1, 2, 3, 4}
+// shorthand
+a := []int{1, 2, 3, 4}
+// ["a", "b", "c"]
+chars := []string{0:"a", 2:"c", 1: "b"}
 
-var b = a[lo:hi]	// creates a slice (view of the array) from index lo to hi-1
-var b = a[1:4]		// slice from index 1 to 3
-var b = a[:3]		// missing low index implies 0
-var b = a[3:]		// missing high index implies len(a)
-a =  append(a,17,3)	// append items to slice a
-c := append(a,b...)	// concatenate slices a and b
+// creates a slice (view of the array) from index lo to hi-1
+var b = a[lo:hi]
+// slice from index 1 to 3
+var b = a[1:4]
+// missing low index implies 0
+var b = a[:3]
+// missing high index implies len(a)
+var b = a[3:]
+// append items to slice a
+a =  append(a,17,3)
+// concatenate slices a and b
+c := append(a,b...)
 
 // create a slice with make
-a = make([]byte, 5, 5)	// first arg length, second capacity
-a = make([]byte, 5)	// capacity is optional
+a = make([]byte, 5, 5)    // first arg length, second capacity
+a = make([]byte, 5)    // capacity is optional
 
 // create a slice from an array
 x := [3]string{"Лайка", "Белка", "Стрелка"}

sheets/_go/switch

@@ -10,7 +10,7 @@ default:
     fmt.Println("Other")
 }
 
-// as with for and if, you can have an assignment statement before the switch value 
+// as with for and if, you can have an assignment statement before the switch value
 switch os := runtime.GOOS; os {
 case "darwin": ...
 }

sheets/_js/1line

@@ -8,7 +8,7 @@ var newA = myArray.slice(0);
 '<b>A</b>'.replace(/<[^>]+>/gi, '');
 
 // Reverse a string
-var str = "abc def ghi."; 
+var str = "abc def ghi.";
 str.split('').reverse().join('');   // '.ihg fed cba'
 
 // Reverse order of words in a string

sheets/_mathematica/levelspec

@@ -14,8 +14,8 @@ Map[f,l,{2,5}]
 (* The default levelspec is {1} *)
 Map[f,l]===Map[f,l,{1}]
 
-(* 
+(*
 A positive level n consists of all parts of expr specified by n indices.
 A negative level -n consists of all parts of expr with depth n.
 Level 0 corresponds to the whole expression.
-*)
+*)

sheets/_perl/subroutines

@@ -28,7 +28,7 @@ named_params_example({
 sub named_params_with_defaults {
    my ( $arg ) = @_;
    # Use my ( $self, $arg ) = @_; if you are in object land.
-   # 
+   #
    # Set defaults
    #         If option given      Use options   Else
    my $one = exists $arg->{one} ? $arg->{one} : "default1";

sheets/_perl6/hello

@@ -1,4 +1,4 @@
-# to install: 
+# to install:
 #             (Debian/Ubuntu) apt-get install rakudo
 #             (Fedora/CentOS) yum install perl6 (or rakudo)
 # to execute: perl6 my_script.pl

sheets/_psql/tables

@@ -22,7 +22,7 @@ ALTER TABLE table_name ALTER COLUMN [SET DEFAULT value | DROP DEFAULT]
 ALTER TABLE table_name ADD PRIMARY KEY (column,...);
 
 -- Remove the primary key from a table
-ALTER TABLE table_name 
+ALTER TABLE table_name
 DROP CONSTRAINT primary_key_constraint_name;
 
 -- Rename a table

sheets/_python/func

@@ -1,40 +1,40 @@
 # Simple function
 def functionName():
-	return True
+    return True
 
 # Function with parameters
-def functionName(a, b): 
-	if a < b: 
-		return a
-	else: 
-		return b
+def functionName(a, b):
+    if a < b:
+        return a
+    else:
+        return b
 
 # Return multiple values
-def functionName(a, b, c): 
-	return a, b, c										# Returns a tuple
-	return {'return_a':a, 'return_b':b ,'return_c':c }	# Returns a dictionary 
+def functionName(a, b, c):
+    return a, b, c                                       # Returns a tuple
+    return {'return_a':a, 'return_b':b ,'return_c':c }   # Returns a dictionary
 
 # Function with default parameters
-def functionName(a=0, b=1): 
-	print(a, b)
-functionName()		# 0 1
-functionName(3)		# 3 1
-functionName(3, 4)	# 3 4
+def functionName(a=0, b=1):
+    print(a, b)
+functionName()        # 0 1
+functionName(3)       # 3 1
+functionName(3, 4)    # 3 4
 
 # Calling parameters by name
-def functionName(a, b, c): 
-	print(a, b, c)
-functionName(0, 1, 2)		# 0 1 2
-functionName(a=2, c=3, b=4)	# 2 4 3
-functionName(2, 3, c=4)		# 2 3 4
+def functionName(a, b, c):
+    print(a, b, c)
+functionName(0, 1, 2)          # 0 1 2
+functionName(a=2, c=3, b=4)    # 2 4 3
+functionName(2, 3, c=4)        # 2 3 4
 
 # Arbitrary number of parameters
 def functionName(*args):
-	...
-functionName(*[1, 2])		# Equivalent of functionName(1, 2)
-functionName(*[1, 2, 3])	# Equivalent of functionName(1, 2, 3)
+    ...
+functionName(*[1, 2])       # Equivalent of functionName(1, 2)
+functionName(*[1, 2, 3])    # Equivalent of functionName(1, 2, 3)
 
 # Arbitrary number of parameters with arbitrary name
 def functionName(**kwargs):
-	...
-functionName(**{'a' : 3, 'b' : 4})	# Equivalent of functionName(a=3, b=4)
+    ...
+functionName(**{'a' : 3, 'b' : 4})    # Equivalent of functionName(a=3, b=4)

sheets/_python/lambda

@@ -1,33 +1,33 @@
 # Lambda are anonymous functions in Python by using the keyword lambda
-# Therefore they are not bound to a name 
+# Therefore they are not bound to a name
 
-# Simple Lambda Function 
+# Simple Lambda Function
 a = lambda parameter: parameter + 40
 #
 print (a(2))                    # Outputs 42
 
 # Lambda Functions Inside Real Functions
-def subtract_func(n) : 
+def subtract_func(n) :
     return lambda x: x - n
 #
 a = subtract_func(1)            # Sets n to 1 for a
-b = subtract_func(2)            # Sets n to 2 for b 
+b = subtract_func(2)            # Sets n to 2 for b
 #
 print(a(-4))                    # Outputs -5 ( -5 = -4 - 1 )
 print(b(-2))                    # Outputs -4 ( -4 = -2 - 2 )
 
-# Lambda Function with Multiple Parameters 
-f = lambda x, y : x + y 
+# Lambda Function with Multiple Parameters
+f = lambda x, y : x + y
 #
 print( f(1,1) )                 # Outputs 2 ( 1 + 1 )
 
 # map() + lambda functions
-a = [1, 2, 3, 4, 5]              
-b = [1, 2, 3, 4, 5]             
+a = [1, 2, 3, 4, 5]
+b = [1, 2, 3, 4, 5]
 #
-r = map(lambda x,y : x+y, a,b)  # map() will return an iterator  
-r_list = list(r)                # listify r 
-print(r_list)                   # prints [2, 4, 6, 8, 10] 
+r = map(lambda x,y : x+y, a,b)  # map() will return an iterator
+r_list = list(r)                # listify r
+print(r_list)                   # prints [2, 4, 6, 8, 10]
 
 # filter() + lambda functions
 # Program to filter out only the even items from a list
@@ -35,4 +35,4 @@ my_list = [1, 5, 4, 6, 8, 11, 3, 12]
 #
 new_list = list(filter(lambda x: (x%2 == 0) , my_list))
 #
-print(new_list) 				# Output: [4, 6, 8, 12]
+print(new_list)                 # Output: [4, 6, 8, 12]

sheets/_python/loops

@@ -1,12 +1,12 @@
 # Basic conditional:
 if x > 0:
-	print(x)
+    print(x)
 
 # 'if else'
-if x > 0: 
-	print(x)
-else: 
-	print(-x)
+if x > 0:
+    print(x)
+else:
+    print(-x)
 
 #ternary operator
 parity = 'even' if x % 2 == 0 else 'odd'
@@ -14,69 +14,69 @@ parity = 'even' if x % 2 == 0 else 'odd'
 '''
 # Equivalent of:
 if x % 2 == 0:
-	parity = 'even'
+    parity = 'even'
 else:
-	parity = 'odd'
+    parity = 'odd'
 '''
 
 # multiple conditions:
 if x > 0:
-	print(x)
+    print(x)
 elif x == 0:
-	print(420)
+    print(420)
 elif x == 1:
-	print(421)
+    print(421)
 else:
-	print(-x)
+    print(-x)
 
 # Basic 'for' loop:
 for i in range(6):
-	print(i) #prints 0, 1, 2, 3, 4, 5
-
+    print(i) #prints 0, 1, 2, 3, 4, 5
+#
 for i in range(2, 6):
-	print(i) #prints 2, 3, 4, 5
-
+    print(i) #prints 2, 3, 4, 5
+#
 for i in range(3, 10, 2):
-	print(i) #prints 3, 5, 7, 9
+    print(i) #prints 3, 5, 7, 9
 
 # Iterating through collections:
 for i in [0, 1, 1, 2, 3, 5]:
-	print(i) #prints 0, 1, 1, 2, 3, 5
-
+    print(i) #prints 0, 1, 1, 2, 3, 5
+#
 for i in 'qwerty':
-	print(i) #prints q, w, e, r, t, y
+    print(i) #prints q, w, e, r, t, y
 
 # 'for else':
 for i in x:
-	if i == 0:
-		break
+    if i == 0:
+        break
 else:
-	print('not found')
+    print('not found')
 
 '''
 # Equivalent of:
 flag = False
 for i in x:
-	if i == 0:
-		flag = True
-		break
+    if i == 0:
+        flag = True
+        break
 if not flag:
-	print('not found')
+    print('not found')
 '''
 
 # Basic 'while' loop:
 x = 0
 while x < 6:
-	print(i)
-	x += 2
+    print(i)
+    x += 2
 # prints 0, 2, 4
 
 # No 'do while' loop in Python.
 # Equivalent with 'while' loop:
 x = 4
 while True:
-	print(x)
-	x += 1
-	if x >= 4:
-		break
+    print(x)
+    x += 1
+    if x >= 4:
+        break
 # prints 4

sheets/_python3/classes

@@ -3,13 +3,13 @@
 class Dog:
     # __init__ is the constructor, run on instantiation
     # The 'self' parameter refers to the calling instance of the class.
-    # It's automatically provided to methods called on an instance of this 
+    # It's automatically provided to methods called on an instance of this
     # class. It can be named anything, but 'self' is the convention.
     def __init__(self, name):
         self.name = name
 
     # Class methods (or static methods) are created by adding the staticmethod
-    # decorator. The 'self' parameter is not passed to these methods. 
+    # decorator. The 'self' parameter is not passed to these methods.
     @staticmethod
     def unrelated_class_method():
         print('this is not an instance method')

sheets/_rust/threads

@@ -6,7 +6,7 @@ fn main() {
     let t = thread::spawn(|| {
         println!("In a new thread!");
     });
-    
+
     // Wait for execution of spawned thread to join back up with main thread
     let result = t.join();
 

sheets/_scala/DataStructures

@@ -5,7 +5,7 @@
 // This example would be a Tuple3
 (1,2,3)
 
-// tuple sugar 
+// tuple sugar
 // This example would be a Tuple2
 (1 -> 2) //same as
 (1, 2)

sheets/_scala/ManipulatingCollections

@@ -11,8 +11,8 @@ l map (_ * 2)           //returns List(2,4,6,8,10)
 // allows the ability to provide different map functions for different discrete cases
 // this example will increment odd numbers by one, but double even numbers
 l map {    //note: the curly brackets allow us to make the map multi-line and use 'case' statements (see PatternMatching)
-	case num if num % 2 == 0 => num * 2
-	case other => other + 1
+    case num if num % 2 == 0 => num * 2
+    case other => other + 1
 }                       //returns List(2,4,4,8,6)
 
 // filter
@@ -26,7 +26,7 @@ l filter (_ % 2 == 0)   //returns List(1,3,5)
 // this is like a combination of filter and map
 // this example shows that collect essentially filters by "i < 3" then maps with "_ + 20"
 l collect {    //note: collect requires a partial function, so we have to use curly brackets and 'case' statements
-	case i if i < 3 => i + 20
+    case i if i < 3 => i + 20
 }                       //returns List(21, 22)
 
 // find
@@ -66,12 +66,12 @@ List(List(1,2,3), List(4,5)).flatten  //returns List(1,2,3,4,5)
 // maps then flattens in one function
 // in this example, we will map and flatMap a List[Int] using a function that turns each Int into a List[Int]
 List(1,2,3) map {
-	num => List(num, num)
+    num => List(num, num)
 }
-// for this example, mapping returns List(List(1,1),List(2,2),List(3,3)) 
+// for this example, mapping returns List(List(1,1),List(2,2),List(3,3))
 //vs
 List(1,2,3) flatMap {
-	num => List(num, num)
+    num => List(num, num)
 } // returns List(1,1,2,2,3,3)
 
 // isEmpty
@@ -89,12 +89,12 @@ oneToSix diff (fourToNine)  //returns List(1,2,3)
 fourToNine diff (oneToSix)  //returns List(7,8,9)
 
 // intersect
-// returns the "intersection" of two collections, these are the elements that exist in both collections 
+// returns the "intersection" of two collections, these are the elements that exist in both collections
 val oneToSix   = List(1, 2, 3, 4, 5, 6)
 val fourToNine = List(4, 5, 6, 7, 8, 9)
 oneToSix intersect (fourToNine)  //returns List(4,5,6)
 fourToNine intersect (oneToSix)  //returns List(4,5,6)
- 
+
 // union
 // returns the concatenation of the two lists
 val oneToSix   = List(1, 2, 3, 4, 5, 6)
@@ -199,4 +199,4 @@ List(1,2,3).tail        //returns List(2,3), same as
 List(1,2,3).drop(1)
 
 // last
-List(1,2,3).last  //returns 3
+List(1,2,3).last  //returns 3

sheets/_scala/ObjectOrientation

@@ -23,7 +23,7 @@ class C(var x: R) {
   //
   // alternative constructor
   def this = this(42)
-}   
+}
 
 // anonymous class
 new{ ... }

sheets/_scala/PatternMatching

@@ -1,21 +1,21 @@
 // use case in function args for pattern matching.
-(xs zip ys) map { case (x,y) => x*y }   // GOOD 
-(xs zip ys) map( (x,y) => x*y )         // BAD 
+(xs zip ys) map { case (x,y) => x*y }   // GOOD
+(xs zip ys) map( (x,y) => x*y )         // BAD
 
 // "v42" is interpreted as a name matching any Int value, and "42" is printed.
 // BAD
 val v42 = 42
 Some(3) match {
-  case Some(v42) => println("42")
-  case _ => println("Not 42")
+    case Some(v42) => println("42")
+    case _ => println("Not 42")
 }
 
 // "`v42`" with backticks is interpreted as the existing val v42, and “Not 42” is printed.
 // GOOD
 val v42 = 42
 Some(3) match {
-  case Some(`v42`) => println("42")
-  case _ => println("Not 42")
+    case Some(`v42`) => println("42")
+    case _ => println("Not 42")
 }
 
 // UppercaseVal is treated as an existing val, rather than a new pattern variable, because it starts with an uppercase letter.
@@ -23,24 +23,24 @@ Some(3) match {
 // GOOD
 val UppercaseVal = 42
 Some(3) match {
-  case Some(UppercaseVal) => println("42")
-  case _ => println("Not 42")
+    case Some(UppercaseVal) => println("42")
+    case _ => println("Not 42")
 }
 
 // Creating an alias for a match
 // This will maintain the original value passed into the match function, using the '@' symbol, and print "Matched Some(3)"
 Some(3) match {
-	case foundSome @ Some(_) => println("Matched " + foundSome)
-	case _ => println("Matched nothing")
+    case foundSome @ Some(_) => println("Matched " + foundSome)
+    case _ => println("Matched nothing")
 }
 
 // Case Classes
 // This method allows you to match on any combination of properties of a case class
 case class Example(a: Int, b: String, c: Boolean)
 Example(1, "word", true) match {
-	case Example(3, _, _)         => println("Matches any Example where a = 3")
-	case Example(_, "foo", _)     => println("Matches any Example where b = foo")
-	case Example(_, _, false)     => println("Matches any Example where c = false")
-	case Example(1, "word", true) => println("Matches our Example")
-	case Example(_, _, _)         => println("Matches any other Example")
+    case Example(3, _, _)         => println("Matches any Example where a = 3")
+    case Example(_, "foo", _)     => println("Matches any Example where b = foo")
+    case Example(_, _, false)     => println("Matches any Example where c = false")
+    case Example(1, "word", true) => println("Matches our Example")
+    case Example(_, _, _)         => println("Matches any other Example")
 }

sheets/_scala/Variables

@@ -9,7 +9,7 @@ val x = 5
 // BAD
 x = 5
 
-// lazy value 
+// lazy value
 // immutable, evaluated once but only when called
 lazy val x = 5
 

sheets/awk

@@ -1,7 +1,7 @@
-# sum integers from a file or stdin, one integer per line:
+# sum integers from a file or STDIN, one integer per line:
 printf '1\n2\n3\n' | awk '{ sum += $1} END {print sum}'
 
-# using specific character as separator to sum integers from a file or stdin
+# using specific character as separator to sum integers from a file or STDIN
 printf '1:2:3' | awk -F ":" '{print $1+$2+$3}'
 
 # print a multiplication table
@@ -16,31 +16,36 @@ awk -v RS='' '/42B/' file
 # display only first column from multi-column text
 echo "first-column  second-column  third-column" | awk '{print $1}'
 
-# Use awk solo; without the need for something via STDIN.
+# Use AWK solo; without the need for something via STDIN.
 awk BEGIN'{printf("Example text.\n")}'
 
-# Accessing environment variables from within awk.
+# Accessing environment variables from within AWK.
 awk 'BEGIN{print ENVIRON["LS_COLORS"]}'
 
 # One method to count the number of lines; in this case, read from STDIN.
 free | awk '{i++} END{print i}'
 
-# Output a (unique) list of available sections under which to create a DEB package.
+# Output unique list of available sections under which to create a DEB package.
 awk '!A[$1]++{print($1)}' <<< "$(dpkg-query --show -f='${Section}\n')"
 
-# Using process substitution (`<()` is NOT command substitution), with AWK and its
-# associative array variables, we can print just column 2 for lines whose first
-# column is equal to what's between the double-quotes.
+# Using process substitution (`<()` is NOT command substitution), with AWK and
+# its associative array variables, we can print just column 2 for lines whose
+# first column is equal to what's between the double-quotes.
 awk '{NR!=1&&A[$1]=$2} END{print(A["Mem:"])}' <(free -h)
-# While below is an easier and simpler solution to the above, it's not at all the
-# same, and in other cases, the above is definitely preferable; more accurate.
+# While below is an easier and simpler solution to the above, it's not at all
+# the same, and in other cases, the above is definitely preferable.
 awk '/^Mem:/{print($2)}' <(free -h)
 
-# Output a unique-d list of uppercase-only, sigil-omitted variables used in [FILE].
+# Output list of unique uppercase-only, sigil-omitted variables used in [FILE].
 awk '{for(F=0; F<NF; F++){if($F~/^\$[A-Z_]+$/){A[$F]++}}} END{for(I in A){X=substr(I, 2, length(I)); printf("%s\n", X)}}' [FILE]
 
-# Output only lines from FILE between PATTERN_1 and PATTERN_2. Good for log files.
+# Output only lines from FILE between PATTERN_1 and PATTERN_2. Good for logs.
 awk '/PATTERN_1/,/PATTERN_2/{print}' [FILE]
 
 # Pretty-print a table of an overview of the non-system users on the system.
 awk -SPF ':' 'BEGIN {printf("%-17s %-4s %-4s %-s\n", "NAME", "UID", "GID", "SHELL")} $3>=1000 && $1!="nobody" {printf("%-17s %-d %-d %-s\n", $1, $3, $4, $7)}' /etc/passwd
+
+# Display the total amount of MiB of RAM available in the machine. This is also
+# a painful but useful workaround to get the units comma-separated, as would be
+# doable with Bash's own `printf` built-in.
+awk '/^MemTotal:/ {printf("%'"'"'dMiB\n", $2 / 1024)}'

sheets/az

@@ -5,7 +5,7 @@
 curl -L https://aka.ms/InstallAzureCli | bash
 
 # create a resource group named "MyResourceGroup" in the westus2 region of Azure
-az group create -n MyResourceGroup -l westus2 
+az group create -n MyResourceGroup -l westus2
 
 # create a Linux VM using the UbuntuTLS image, with two attached storage disks of 10 GB and 20 GB
 az vm create -n MyLinuxVM -g MyResourceGroup --ssh-key-value $HOME/.ssh/id_rsa.pub --image UbuntuLTS --data-disk-sizes-gb 10 20

sheets/bonnie

@@ -1,4 +1,4 @@
-# Bonnie++ 
+# Bonnie++
 # disk and file system benchmarking tool for measuring I/O performance
 
 # benchmark disk mounted at /tmp/; use `user` for that

sheets/btrfs

@@ -1,7 +1,7 @@
 # Create a btrfs file system on /dev/sdb, /dev/sdc, and /dev/sdd
 mkfs.btrfs /dev/sdb /dev/sdc /dev/sdd
 
-# btrfs with just one hard drive, metadata not redundant 
+# btrfs with just one hard drive, metadata not redundant
 # (this is danegerous: if your metadata is lost, your data is lost as well)
 mkfs.btrfs -m single /dev/sdb
 

sheets/bzr

@@ -2,7 +2,7 @@
 cd ~/.bazaar/plugins
 bzr branch lp:bzr-fastimport fastimport
 # you can do it manually:
-# pip install 
+# pip install
 # python setup.py build_ext -i
 # mv ... ~/.bazaar/plugins
 # probably you will need this patch:

sheets/cat

@@ -1,2 +1,16 @@
 # POSIX-ly correct way in which to cat(1); see cat(1posix).
 cat -u [FILE_1 [FILE_2] ...]
+
+# Output a file, expanding any escape sequences (default). Using this short
+# one-liner let's you view the boot log how it was show at boot-time.
+cat /var/log/boot.log
+
+# This is an ever-popular useless use of cat.
+cat /etc/passwd | grep '^root'
+# The sane way:
+grep '^root' /etc/passwd
+
+# If in bash(1), this is often (but not always) a useless use of cat(1).
+Buffer=`cat /etc/passwd`
+# The sane way:
+Buffer=`< /etc/passwd`

sheets/curl

@@ -14,7 +14,7 @@ curl http://example.com/pic[1-24].jpg
 curl -L http://example.com/file
 
 # Download a file and pass HTTP Authentication
-curl -u username:password URL 
+curl -u username:password URL
 
 # Download a file with a Proxy
 curl -x proxysever.server.com:PORT http://addressiwantto.access

sheets/dcfldd

@@ -1,4 +1,4 @@
-# enhanced version of GNU dd with features useful for forensics and security. 
+# enhanced version of GNU dd with features useful for forensics and security.
 # includes ability to have mulitple output targets
 
 # write file image to an SD card showing a progress bar based on filesize

sheets/dd

@@ -1,26 +1,42 @@
 # Read from {/dev/urandom} 2*512 Bytes and put it into {/tmp/test.txt}
-# Note: At the first iteration, we read 512 Bytes.
-# Note: At the second iteration, we read 512 Bytes.
-dd if=/dev/urandom of=/tmp/test.txt count=512 bs=2
+# Note: both iterations each read 512 Bytes (the selected block size).
+dd if=/dev/urandom of=/tmp/test.txt count=2 bs=512
 
-# Watch the progress of 'dd'
-dd if=/dev/zero of=/dev/null bs=4KB &; export dd_pid=`pgrep '^dd'`; while [[ -d /proc/$dd_pid ]]; do kill -USR1 $dd_pid && sleep 1 && clear; done
+# Watch the progress of dd(1).
+dd if=/dev/zero of=/dev/null bs=4KB &
+export dd_pid=`pgrep '^dd'`
+while [[ -d /proc/$dd_pid ]]; do
+    kill -USR1 $dd_pid && sleep 1
+    clear
+done
 
-# Watch the progress of 'dd' with `pv` and `dialog` (apt-get install pv dialog)
-(pv -n /dev/zero | dd of=/dev/null bs=128M conv=notrunc,noerror) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0
+# Watch the progress of dd(1) with pv(1) and dialog(1), both of which can be
+# installed with the following command: apt-get install pv dialog
+(
+    pv -n /dev/zero | dd of=/dev/null bs=128M conv=notrunc,noerror
+) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0
 
-# Watch the progress of 'dd' with `pv` and `zenity` (apt-get install pv zenity)
-(pv -n /dev/zero | dd of=/dev/null bs=128M conv=notrunc,noerror) 2>&1 | zenity --title 'Running dd command (cloning), please wait...' --progress
+# Watch the progress of dd(1) with pv(1) and zenity(1), both of which can be
+# installed with the following command: apt-get install pv zenity
+(
+    pv -n /dev/zero | dd of=/dev/null bs=128M conv=notrunc,noerror
+) 2>&1 | zenity --title 'Running dd command (cloning), please wait...' --progress
 
-# Watch the progress of 'dd' with the built-in `progress` functionality (introduced in coreutils v8.24)
+# Watch the progress of dd(1) with the built-in `progress` functionality, -
+# introduced in coreutils v8.24.
 dd if=/dev/zero of=/dev/null bs=128M status=progress
 
 # DD with "graphical" return
 dcfldd if=/dev/zero of=/dev/null bs=500K
 
-# This will output the sound from your microphone port to the ssh target computer's speaker port. The sound quality is very bad, so you will hear a lot of hissing.
+# This will output the sound from your microphone port to the ssh target
+# computer's speaker port. The sound quality is very bad, so you will hear a
+# lot of hissing.
 dd if=/dev/dsp | ssh -c arcfour -C username@host dd of=/dev/dsp
 
 # Show current progress without interruption (USR1)
 dd if=/dev/zero of=/dev/null & pid=$!
 kill -USR1 $pid
+
+# Create a 1GiB file with nothing but zeros, ready to mkswap(8) it.
+dd if=/dev/zero of=/swapfile count=1048576 bs=1024 status=progress

sheets/df

@@ -1,14 +1,17 @@
-# Printout disk free space in a human readable format
+# Print free disk space in a [h]uman-readable format.
 df -h
 
-# Disk free space for ext2 file systems
+# Free disk space for [t]ype EXT2 file systems.
 df -t ext2
 
-# Disk free space for file systems except ext2
+# Free disk space for filesystems, e[x]cluding EXT2.
 df -x ext2
 
-# Show inode usage
+# Show [i]node usage.
 df -i
 
-# Show information about a distinct file system /path
-df /path
+# Show information about a distinct filesystem path.
+df [PATH]
+
+# List [a]ll filesystems, + unreadable, duplicates, pseudo, and inaccessible.
+df -a

sheets/exec

@@ -1,17 +1,17 @@
 # exec
 #
 # Shell builtin command
-# It can start a new process to replace the shell, without a new process creation.
-# It can make redirections take effect in the current shell
+# It can start a new process to replace the shell, without a new process
+# creation. It can make redirections take effect in the current shell
 
-# Redirect the output of an entire shell script within the script itself
-# Only stdout:
+# Redirect all STDOUT from within a script to the given file.
 exec > foo.log
 
-# Redirect the output of an entire shell script within the script itself
-# Stdout and stderr:
+# Redirect all of both STDOUT & STDERR from within a script to the given file.
 exec > foo.log 2>&1
+# Or, if on bash(1), this syntax is also viable:
+exec &> foo.log
 
-# Copy output to a log file
+# Copy output to a log file, allowing the outputs to still work as usual.
 exec >  >(tee -ia foo.log)
 exec 2> >(tee -ia foo.log >&2)

sheets/fdisk

@@ -1,10 +1,5 @@
-# list partitions
-fdisk -l /dev/sda
-
-# delete a partition
-fdisk /dev/sda
-Command (m for help): d
-Partition number (1-9): XXX
+# List partitions on BLKDEV, such as `/dev/sda`.
+fdisk -l [BLKDEV]
 
 # Usage:
 #   fdisk [options] <disk>    change partition table

sheets/i3

@@ -101,17 +101,19 @@ bindsym $mod+4 workspace $ws4
 bindsym $mod+Shift+R exec custom-script-in-path.sh --flag1 --flag2
 bindcode 172 exec playerctl play-pause
 
-# Always execute code when i3 starts:
+# Execute code when i3 starts, but only once per session:
 exec --no-startup-id ~/.config/polybar/launch.sh
+# Always execute code when i3 starts, even if it's simply restarted:
+exec_always --no-startup-id ~/.config/polybar/launch.sh
 
 # One can make special modes (much like resize mode)
 set $gamingMode "gaming_mode"
 bindsym $mod+g mode $gamingMode
 mode $gamingMode {
-   # Insert declarations for this mode
-   # Useful when normal keybindings fight with keybindings of your games
-   # Don't forget to add option to return from this mode!
-   bindsym $mod+Escape mode default
+    # Insert declarations for this mode. Useful when normal keybindings fight
+    # with keybindings of your games. Don't forget to add option to return from
+    # this mode!
+    bindsym $mod+Escape mode default
 }
 
 # Move workspace between multiple monitors

sheets/identify

@@ -1,4 +1,4 @@
-# identify 
+# identify
 #
 # describes the format and characteristics of one or more image files
 

sheets/ioreg

@@ -1,4 +1,4 @@
-# ioreg 
+# ioreg
 # show I/O Kit registry (Mac OS X)
 
 # find out the arch of the efi firmware in a Mac

sheets/jq

@@ -58,7 +58,7 @@ jq 'flatten(1)'
 
 # Converting to csv
 jq '.[] | [.foo, .bar] | @csv' -r
-# 
+#
 # [{ "foo": 1, "bar": 2, "baz":3 }]
 # => 1,2
 

sheets/jslint

@@ -1,5 +1,5 @@
 # jslint
-# 
+#
 # The JavaScript Code Quality Tool written by Dougls Crockford
 
 # to install jslint

sheets/julia

@@ -1,4 +1,4 @@
-# Julia 
+# Julia
 # high-level dynamic programming language designed to address the needs of high-performance numerical analysis
 # and computational science while also being effective for general-purpose programming
 

sheets/launchctl

@@ -9,11 +9,11 @@
 # whenever the user logs in:
 launchctl load ~/Library/LaunchAgents/my_script.plist
 
-# Activate an agent which requires root privileges to run 
+# Activate an agent which requires root privileges to run
 # and/or should be loaded whenever any user logs in (note the absence of ~ in the path):
 sudo launchctl load /Library/LaunchAgents/root_script.plist
 
-# Activate a system-wide daemon to be loaded 
+# Activate a system-wide daemon to be loaded
 # whenever the system boots up (even if no user logs in):
 sudo launchctl load /Library/LaunchDaemons/system_daemon.plist
 

sheets/libreoffice

@@ -4,6 +4,6 @@ libreoffice --headless --convert-to pdf *.pptx
 # Save them to a different directory?
 libreoffice --headless --convert-to pdf *.docx --outdir ~/docs/
 
-# Convert files nested inside folders? 
+# Convert files nested inside folders?
 # This uses sharkdp/fd, you could use GNU find, xargs etc.
 fd -e doc -e docx -x libreoffice --headless --convert-to pdf --outdir {//} {}

sheets/lshw

@@ -1,33 +1,33 @@
 # lshw
 # Get hardware information on Linux
 
-# Generate full information report about all detected hardware
+# Generate full information report about all detected hardware.
 lshw
 
-# Display hardware information in short
+# Display brief hardware information.
 lshw -short
 
-# Display only memory information
+# Display only memory information.
 lshw -short -class memory
 
-# Display processor information
+# Display processor information.
 lshw -class processor
 
-# Display the disk drives with the disk class
+# Display the disk drives with the disk class.
 lshw -short -class disk
 
 # Display information about the partitions and controllers also,
-# specify the storage and volume class along with the disk class
+# specify the storage and volume class along with the disk class.
 lshw -short -class disk -class storage -class volume
 
-# Network adapter information
+# Network adapter information.
 lshw -class network
 
-# Display the address details of pci, usb, scsi and ide devices
+# Display the address details of PCI, USB, SCSI and IDE devices.
 lshw -businfo
 
-# Generate report in html format
+# Generate report in HTML format.
 lshw -html > hardware.html
 
-# Generate report in xml format
+# Generate report in XML format.
 lshw -html > hardware.html

sheets/ncmpcpp

@@ -1,6 +1,6 @@
 # ncmpcpp is an mpd client (compatible with mopidy) with a UI very similar to ncmpc,
 # but it provides new useful features such as support for regular expressions for library searches,
-# extended song format, items filtering, the ability to sort playlists, and a local filesystem browser. 
+# extended song format, items filtering, the ability to sort playlists, and a local filesystem browser.
 
 # configure ncmpcpp
 mkdir ~/.ncmpcpp

sheets/objdump

@@ -1,4 +1,4 @@
-# objdump 
+# objdump
 # program for displaying various information about object files
 
 # Display the contents of the overall file header

sheets/percol

@@ -1,6 +1,6 @@
 # percol
 #
-# adds flavor of interactive filtering to the traditional pipe concept of UNIX shell 
+# adds flavor of interactive filtering to the traditional pipe concept of UNIX shell
 
 # to install percol
 sudo pip install percol

sheets/perl6

@@ -2,7 +2,7 @@
 # The Perl 6 Language Implementation
 
 # to install perl6 (in Debian/Ubuntu)
-apt-get install rakudo 
+apt-get install rakudo
 
 # To install rakudobrew and zef (perl 6 package management)
 git clone https://github.com/tadzik/rakudobrew ~/.rakudobrew

sheets/php

@@ -1,4 +1,4 @@
-# PHP is a server-side scripting language designed primarily for web development 
+# PHP is a server-side scripting language designed primarily for web development
 # but also used as a general-purpose programming language
 
 # To view the php version:

sheets/printf

@@ -10,3 +10,9 @@ printf '%s\n' "$USER"
 # one million, in a human-readable kind of way, by appropriately
 # comma-separating the units.
 printf "%'d\n" {1..1000000}
+
+# Zero-pad a number in order to maintain a width of 3 characters.
+printf '%#.3d\n' 12
+# As above, but instead, space-pad the number. Prefix the `3` with a hyphen
+# (`-`) to left-align the number, causing the padding to occur on the right.
+printf '%3d\n' 12

sheets/proc

@@ -12,3 +12,6 @@ cat /proc/<pid>/status
 
 # See every file the process has open
 ls -l /proc/<pid>/fd
+
+# Display some useful memory statistics, often used by programs like htop(1).
+cat /proc/meminfo

sheets/python

@@ -10,10 +10,10 @@ python -m SimpleHTTPServer
 # Python 3
 python -m http.server 8000
 
-# SMTP-Server for debugging, messages will be discarded, and printed on stdout.
+# SMTP-Server for debugging, messages will be discarded, and printed on STDOUT.
 python -m smtpd -n -c DebuggingServer localhost:1025
 
-# Pretty print a json
+# Pretty print a JSON
 python -mjson.tool
 
 # Zen of Python

sheets/rclone

@@ -11,7 +11,7 @@ rclone ls remote:path
 rclone copy /local/path remote:path
 
 # Sync /local/path to the remote
-rclone sync /local/path remote:path 
+rclone sync /local/path remote:path
 
 # Server side Copy
 rclone copy s3:oldbucket s3:newbucket

sheets/rustup

@@ -1,5 +1,5 @@
 # rustup
-# The Rust toolchain installer 
+# The Rust toolchain installer
 
 # update rustup toolchain
 rustup update

sheets/sgdisk

@@ -22,7 +22,7 @@ sgdisk -l=sgdisk-sda.bak
 # Clone your current device's partition layout '/dev/sda' to another drive '/dev/sdc'
 sgdisk -R=/dev/sdc /dev/sda
 
-# If both drives will be in the same computer, you need to randomize the GUID's after cloning
+# If both drives will be in the same computer, you need to randomize the GUIDs after cloning
 sgdisk -G /dev/sdc
 
 

sheets/siteciphers

@@ -1,7 +1,7 @@
 # siteciphers (Bash-Snippets)
-# Checks the available ciphers for the SSL of an https site.
+# Checks the available ciphers for the SSL of an HTTPS site.
 
-# Determine the available SSL ciphers for an https website
+# Determine the available SSL ciphers for an HTTPS website
 siteciphers github.com
 
 # Determine the ciphers setting the delay between requests (default is 1 sec)

sheets/source

@@ -1,6 +1,6 @@
-# This is a shell builtin available in bash, but not in the Bourne Shell (`sh`).
-# The contents of FILE (assuming shell script) will be sourced into the current
-# session, allowing external use of things like its functions and variables.
+# This is a shell built-in available in Bash, but not in the Bourne Shell
+# (`sh`). The contents of FILE (assuming shell script) will be sourced into the
+# current session, allowing external use of its functions, variables, etc.
 source FILE
 # The above can be written in short-hand, for the same effect:
 . FILE

sheets/sox

@@ -30,7 +30,7 @@ sox ${mono_wav} -c 2 ${stereo_wav}
 # Generate Different Types of Sounds
 # ${len} - length of audio to synthesize, hh:mm:ss.frac
 # ${freq} - frequencies at the beginning/end of synthesis in Hz
-# ${type} is one of sine, square, triangle, sawtooth, trapezium, exp, 
+# ${type} is one of sine, square, triangle, sawtooth, trapezium, exp,
 #   [white]noise, pinknoise, brown-noise
 # sox -n synth ${len} ${type} ${freq}
 sox -r 8000 -n output.wav synth 3 sine 300-3300

sheets/svgo

@@ -1,28 +1,30 @@
 # svgo
 #
-# SVG Optimizer: a Nodejs-based tool for optimizing Scalable Vector Graphics files.
-# It applies a series of transformation rules (plugins), which can be toggled individually.
+# SVG Optimizer: a Node.js-based tool for optimizing Scalable Vector Graphics
+# files. It applies a series of transformation rules (plugins), which can be
+# toggled individually.
 
-# Optimize a file using the default plugins (overwrites the original file):
+# Optimize a file using the default plugins, overwriting the original file.
 svgo test.svg
 
-# Optimize a file and save the result to another file:
+# Optimize a file and save the result to another file.
 svgo test.svg test.min.svg
 
-# Optimize all SVG files within a folder (overwrites the original files):
-svgo -f path/to/folder/with/svg/files
+# Optimize all SVG files within a directory, overwriting the original files.
+svgo -f path/to/directory/with/svg/files
 
-# Optimize all SVG files within a folder and save the resulting files to another folder:
-svgo -f path/to/input/folder -o path/to/output/folder
+# Optimize all SVG files within a directory and save the resulting files to
+# another directory.
+svgo -f path/to/input/dir -o path/to/output/dir
 
-# Optimize SVG content passed from another command, and save the result to a file:
+# Optimize SVG content passed from another command, then save result to a file.
 cat test.svg | svgo -i - -o test.min.svg
 
-# Optimize a file and print out the result:
+# Optimize a file and print out the result.
 svgo test.svg -o -
 
-# Optimize a file making sure a given plugin is enabled:
+# Optimize a file making sure a given plugin is enabled.
 svgo --enable=plugin_name
 
-# Show available plugins:
+# Show available plugins.
 svgo --show-plugins

sheets/systemd-sysvinit

@@ -1,7 +1,7 @@
 # SysVinit to Systemd Cheatsheet
 # Services
 #-------------------------------------------------------------------------------------------------------------------------------------------------
-# Sysvinit Command              Systemd Command                 Notes 
+# Sysvinit Command              Systemd Command                 Notes
 #-------------------------------------------------------------------------------------------------------------------------------------------------
 # service frobozz start         systemctl start frobozz         Used to start a service (not reboot persistent)
 # service frobozz stop          systemctl stop frobozz          Used to stop a service (not reboot persistent)
@@ -10,19 +10,19 @@
 # service frobozz condrestart   systemctl condrestart frobozz   Restarts if the service is already running.
 # service frobozz status        systemctl status frobozz        Tells whether a service is currently running.
 # ls /etc/rc.d/init.d/          systemctl                       Used to list the services that can be started or stopped
-#                               (or) systemctl list-unit-files --type=service 
+#                               (or) systemctl list-unit-files --type=service
 #                               (or) ls /lib/systemd/system/*.service /etc/systemd/system/*.service
 # chkconfig frobozz on          systemctl enable frobozz        Turn the service on, for start at next boot, or other trigger.
 # chkconfig frobozz off         systemctl disable frobozz       Turn the service off for the next reboot, or any other trigger.
 # chkconfig frobozz             systemctl is-enabled frobozz    Used to check whether a service is configured to start or not in the current environment.
-# chkconfig --list              systemctl list-unit-files --type=service 
-#                               (or) ls /etc/systemd/system/*.wants/   
+# chkconfig --list              systemctl list-unit-files --type=service
+#                               (or) ls /etc/systemd/system/*.wants/
 #                                                               Print a table of services that lists which runlevels each is configured on or off
-# chkconfig --list | grep 5:on  systemctl list-dependencies graphical.target    
+# chkconfig --list | grep 5:on  systemctl list-dependencies graphical.target
 #                                                               Print a table of services that will be started when booting into graphical mode
-# chkconfig frobozz --list      ls /etc/systemd/system/*.wants/frobozz.service  
+# chkconfig frobozz --list      ls /etc/systemd/system/*.wants/frobozz.service
 #                                                               Used to list what levels this service is configured on or off
-# chkconfig frobozz --add       systemctl daemon-reload         Used when you create a new service file or modify any configuration 
+# chkconfig frobozz --add       systemctl daemon-reload         Used when you create a new service file or modify any configuration
 
 # SysVinit to Systemd Cheatsheet
 # Runlevels/targets
@@ -37,9 +37,9 @@
 #                               runlevel4.target
 #                               multi-user.target
 # 3                             runlevel3.target                Multi-user, non-graphical. Users can usually login via multiple consoles or via the network.
-#                               multi-user.target               
+#                               multi-user.target
 # 5                             runlevel5.target                Multi-user, graphical. Usually has all the services of runlevel 3 plus a graphical login.
 #                               graphical.target
 # 6                             runlevel6.target                Reboot
 #                               reboot.target
-# emergency                     emergency.target                Emergency shell 
+# emergency                     emergency.target                Emergency shell

sheets/weather

@@ -1,10 +1,10 @@
 # weather (Bash-Snippets)
-# Provides a 3 day forecast on your current location or a specified location
+# Provides a 3-day forecast on your current location or a specified location
 
-# Get a 3 day forecast for your current location as determined by your ip address
+# Get 3-day forecast for your current location as determined by your IP address
 weather
 
-# Get a 3 day forecast for any location
+# Get 3-day forecast for any location
 weather Tokyo
 
 # Get the current moon phase

sheets/xfs_repair

@@ -1,5 +1,5 @@
 # xfs_repair
-# repair an XFS filesystem 
+# repair an XFS filesystem
 
 # rapair a XFS filesystem
 xfs_repair /dev/dm-0

sheets/xkb

@@ -1,4 +1,4 @@
-# Set the keyboard layout for the current X session 
+# Set the keyboard layout for the current X session
 setxkbmap -layout "us,ru"
 setxkbmap -option "grp:caps_toggle,grp_led:scroll,compose:ralt"
 

sheets/xset

@@ -1,5 +1,5 @@
 # xset
-# user preference utility for X 
+# user preference utility for X
 
 # Disable screen saver blanking
 xset s off
@@ -19,5 +19,5 @@ xset dpms force off
 # Standby screen
 xset dpms force standby
 
-# Suspend screen 
+# Suspend screen
 xset dpms force suspend