From 09fc227bc420a7692fdb7da1b03151f6c47adcb5 Mon Sep 17 00:00:00 2001
From: Igor Chubin <igor@chub.in>
Date: Sat, 3 Jun 2017 21:43:46 +0000
Subject: [PATCH] new cheat sheet: bash

---
 sheets/bash | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 sheets/bash

diff --git a/sheets/bash b/sheets/bash
new file mode 100644
index 0000000..c6a82b3
--- /dev/null
+++ b/sheets/bash
@@ -0,0 +1,35 @@
+# To implement a for loop:
+for file in *;
+do 
+    echo $file found;
+done
+
+# To implement a case command:
+case "$1"
+in
+    0) echo "zero found";;
+    1) echo "one found";;
+    2) echo "two found";;
+    3*) echo "something beginning with 3 found";;
+esac
+
+# Turn on debugging:
+set -x
+
+# Turn off debugging:
+set +x
+
+# Retrieve N-th piped command exit status
+printf 'foo' | fgrep 'foo' | sed 's/foo/bar/'
+echo ${PIPESTATUS[0]}  # replace 0 with N
+
+# Lock file:
+( set -o noclobber; echo > my.lock ) || echo 'Failed to create lock file'
+
+# Fork bomb
+:(){ :|:& };:
+
+# Unix Roulette
+# (Courtesy of Bigown's answer in the joke thread)
+# DANGER! Don't execute!
+[ $[ $RANDOM % 6 ] == 0 ] && rm -rf /* || echo Click #Roulette