Storage

Question 1

list the block devices

Answer 1

1. lsblk
2. ls -l /dev/ | grep “^b”

Question 2

Block device Major and Minor numbers

Answer 2

1 RAM
3 HARD DSK or CD ROm
6 PARALLE PRINTERS
8 SCSI DISK

Question 3

list partition table

Answer 3

sudo fdisk -l /dev/sda

Question 4

Master Boot Record (MBR) partition - Max 2T

Answer 4

2TB max and 4 Primary partition

Question 5

GUID partition

Answer 5

1. No max size per partition
2. Unlimited partitions

Question 6

Let’s partition with gdisk, an improved version of fdisk

Answer 6

It works with GPT partitioning scheme

once in, use ? to see all available options

Question 7

gdisk create new partion

Answer 7

use n to create new partition

Question 8

gdiks partition with default 20 GB

Answer 8

Question 9

Check the newly created partition with gdisk

Answer 9

lsblk
sudo fdisk -l /dev/sdb

Question 10

File System Types

Answer 10

Question 11

Create EXT4 file system

Answer 11

mkfs.ext4 /dev/sdb1
mkdir /mnt/ext4;
mount /dev/sdb1 /mnt/ext4

Question 12

Check if EXT4 mount was successful

Answer 12

mount | grep /dev/sdb1
or
df -hP | grep /dev/sdb1

Question 13

Make the mount available even after reboot. Adding a record to /etc/fstab

Answer 13

echo “/dev/sdb1 /mnt/ext4 ext4 rw 0 0”&raquo_space; /etc/fstb

Question 14

Show disk usage of each files and folder under specific path

Answer 14

du -sh /home/kalinga/*

Question 15

Show disk usage of each volume

Answer 15

du -h