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