Partition management in Linux (CentOS/Red Hat)

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Really thanks to you for your interest in this topics. :)

Hope that your are enjoying Linux. Now in this post we’ll learn, partition management in Linux.

Partition management in Linux (CentOS/Red Hat)

Generally, Window File Systems are FAT32, NTFS.

And, Linux file systems are ext2, ext3, ext4, XFS (current), vfat, swap, ZFS, GlusterFS.

All device files location: /dev/*

* hdd, dvd, cdrom, usb, serial, swap, tty

 

Total Partition: (MBR – Master Boot Record)- (sata) – BIOS

Linux Partition = 15 (4 Primary + 11 Logical)

Windows Partition: 24 C-Z, A- Floppy, B-zip

 

Total Partition: (GPT – which is stands for Guid Partition Table)- UEFI (which is stands for United Extensibel Firmware Interface)

Total Partition: 128

 

SATA/SCSI HDD is marked as sda, sdb, sdc

USB devices is considered in Linux as sda1, sdb1

DVD drivers are markes in Linux (CentOS) as dvd/sr0

So we want to see all partition, just type these command in CLI.

[root@ns1 Desktop]# fdisk -l

sda = 1st sata

sdb = 2nd stata

sdc = 3rd sata

Command to see Linux mounted partition(s)

[root@ns1 Desktop]# df -HT

 

/dev/sda6     xfs     52G   7.0G   43G   15% /

/dev/sda5     xfs     204M   27M   167M 14% /boot

 

[root@desktop1 /]# du -ch home

Partition ID of Linux:

NTFS – 7

Extended – 5

ext3/ext4/xfs – 83

swap – 82

LVM – 8e

vfat – f

RAID – fd

 

Now we want to create a new Partition. So we just’ll just type the command

[root@ns1 dev]# fdisk /dev/sda

 

Command (m for help): m

 

d   delete a partition

l   list known partition types

m   is for print this menu

n   is for adding a new partition

p   is to print the partition table

q   is to quit without saving changes

t  is for changing a partition’s system id

w   is to write table to disk and exit

 

Command (m for help): n

 

[root@ns1 Desktop]# fdisk /dev/sda

 

Command (m for help): n

First sector (415141888-976773119, default 415141888): {press Enter}

Using default value 415141888

Last sector, +sectors or +size{K,M,G} (415141888-976773119, default 976773119): +350M

 

Command (m for help): p

Command (m for help): w

 

Now if you want to update the partition table, just follow this command.

[root@desktop1 ~]# partprobe /dev/sda

 

Want to format a partition? Just follow the command:

[root@ns1 Desktop]# mkfs.xfs /dev/sdaX

 

Want to mount a partition?? Follow this:

[root@ns1 Desktop]# mkdir /data

[root@ns1 Desktop]# df -HT

[root@ns1 Desktop]# mount /dev/sda9 /data

 

[root@ns1 Desktop]# df -HT

[root@ns1 Desktop]# cd /data

[root@ns1 data]# ls

[root@ns1 data]# df -HT

Filesystem   Type     Size   Used Avail Use% Mounted on

/dev/sda6     xfs       16G   6.4G   8.4G 44% /

/dev/sda5     xfs     204M   27M   167M 14% /boot

/dev/sda9     xfs     508M   11M   471M   3% /data

[root@ns1 data]# cd ..       ; This command is going to the previous directory.

[root@ns1 /]# umount /data

[root@ns1 /]# df -HT

Filesystem   Type     Size   Used Avail Use% Mounted on

/dev/sda6     xfs       16G   6.4G   8.4G 44% /

tmpfs       tmpfs     2.0G   267k   2.0G   1% /dev/shm

/dev/sda5     xfs     204M   27M   167M 14% /boot

 

Permanent Mount:

[root@localhost ~]# blkid /dev/sda8

 

[root@ns1 ~]# vi /etc/fstab

 

UUID=1b42c7df-717a-420d-b054-81d5a48594b5   /data xfs   defaults 0 0

 

or

/dev/sda9   /data   xfs     defaults   0 0

 

1                         2              3         4       5 6

1 – partition

2 – mountpoint

3 – filesystem

4 – options(quota,acl)

5-6 – file system check options

 

[root@ns1 ~]# mount -a ;fstab file update

[root@ns1 ~]# df-HT ; view

 

Now, want to delete a partition?? Follow this:

[root@ns1 ~]# fdisk /dev/sda

 

Command (m for help): d

Partition number , generally there is displayed (1-10).

 

Command (m for help): p

Command (m for help): w

 

Note: Before delete, you should unmount partition and delete fstab entry.

 

[root@ns1 ~]# fdisk -l

 

Mount USB pen drive:

[root@ns1 Desktop]# fdisk -l

Disk /dev/sdb: 32.2 GB, 32176472064 bytes

[root@ns1 Desktop]# mount /dev/sdb1 /mnt

[root@ns1 mnt]# cd /mnt

[root@ns1 mnt]# ls

[root@ns1 mnt]# cp cv.docx /root/Desktop

[root@ns1 mnt]# cp /etc/passwd /mnt

[root@ns1 mnt]# cd

[root@ns1 ~]# umount /mnt

[root@ns1 ~]# cd /mnt

[root@ns1 mnt]# ls

 

Mount DVD:

[root@ns1 Desktop]# mount /dev/sr0 /media

[root@ns1 Desktop]# cd /media

[root@ns1 media]# ls

[root@ns1 media]# cd Packages

[root@ns1 Packages]# ls

[root@ns1 Packages]# cd

[root@ns1 ~]# umount /media

[root@ns1 ~]#

 

Screenshots for you: