adding to fdisk cheatsheet

sheets/fdisk

@@ -6,3 +6,58 @@ fdisk /dev/sda
 Command (m for help): d
 Partition number (1-9): XXX
 
+# Usage:
+ fdisk [options] <disk>    change partition table
+ fdisk [options] -l <disk> list partition table(s)
+ fdisk -s <partition>      give partition size(s) in blocks
+
+# Options:
+ -b <size>             sector size (512, 1024, 2048 or 4096)
+ -c[=<mode>]           compatible mode: 'dos' or 'nondos' (default)
+ -h                    print this help text
+ -u[=<unit>]           display units: 'cylinders' or 'sectors' (default)
+ -v                    print program version
+ -C <number>           specify the number of cylinders
+ -H <number>           specify the number of heads
+ -S <number>           specify the number of sectors per track
+
+# To display partition table
+p
+
+# To delete a partition
+d
+
+# To display a list of partition types
+l or L
+
+# To create a new partition
+n
+
+# To change the type of a partition
+t
+
+# To write changes to fdisk
+w
+
+# Adding a new physical disk
+lsblk
+fdisk /dev/sdd
+
+# create new partition in fdisk
+mkfs.xfs /dev/sdd1
+blkid /dev/sdd1
+
+# edit /etc/fstab
+UUID=<blkid#> /opt defaults 0 0 # 00 disable disk checking and metadata dumping
+mount -a
+df -h /opt
+
+# Extending a physical disk (vm)
+1.  Unmount drive - comment out /etc/fstab entry for /dev/sdc
+2.  Increase drive physical space
+3.  parted /dev/sdc - 'p' 	#print partitions on /dev/sdc
+4.  fdisk /dev/sdc - 'p' - 'd' - 'n' (defaults) - w	# delete old partition, create new partition
+5.  reboot
+6.  e2fsck -f /dev/sdc1
+7.  resize2fs /dev/sdc1
+8.  mount /dev/sdc1 - uncomment fstab