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Command CLI

Description & Example

1

lsblk -l

List block devices, lists information about all available or the specified block devices.  List the partition tables
Helps IDENTIFY your filesystem (USB)

sdb1    8:17   1 460.3G  0 part /var/lib/libvirt/images

2

lsblk -f

Same as above, shows the files system type:

`-sdb1 ext4                   467b6668-77bd-46d8-8310-196b8766b4ea    429G     0% /var/lib/libvirt

3

mount -l | grep sd

Displays if /dev/sdb1 is mounted

4

umount /dev/sdb1

Unmounts /dev/sdb1

5

fdisk /dev/sdb

d

p

n, Primary (take defaults)

w

Partition utility

Deletes existing partition if any.

Print

New partition (1) if only one partition needed.

Write

6

fdisk -l

List the partition tables
Note:

/dev/sdb1

7

mkfs.ext4 /dev/sdb1

Formats partition

8

fdisk -l

verify /dev/sdb1

9

lsblk -l

Same

10

lsblk -f

check if ext4

11

mkdir /tmp/mnt

make a temp directory                       (test mount directory)

12

mount /dev/sdb1 /tmp/mnt

Mount /dev/sdb1 to /tmp/mnt        (test mount)

13

vi /tmp/mnt/test.txt

i-insert then type “your text”            (test file)

ESC :wq!   saves the file

14

umount /dev/sdb1

Unmounts /dev/sdb1                        (umounts test)

15

mount /dev/sdb1 /var/lib/libvirt/images

mount /dev/sdb1 /var/lib/libvirt/images

16

more /var/lib/libvirt/images/test.txt

checks if “your text” was saved and now can be seen on images

17

vi /etc/fstab

Type i                     # To insert
/dev/sdb1 /var/lib/libvirt/images ext4 defaults 0 1

ESC :wq!   saves the file and mounts device upon reboot