Commands to check hard disk partitions and disk space on Linux

Posted at November 11, 2016 at 12:53 pm by Jithin

These commands output will provide information regarding the total size, memory consumed and file system.

 

Fdisk

In order to display all the partitions on a disk. File system details also can be seen from this command. But the only thing is that it won’t show the disk partition size.

 $ fdisk -l

Disk /dev/vda: 53.0 GB, 52953088000 bytes, 103424000 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0x0008d0b6

Device Boot      Start              End                   Blocks              Id         System

/dev/vda1   *        2048            1026047          512000            83        Linux

/dev/vda2         1026048         5220351          2097152          82        Linux swap / Solaris

/dev/vda3         5220352         103423999      49101824        83        Linux

 

Sfdisk

As we can see that the output of sfdisk is almost the same as the fdisk, with only difference being is that it shows size of each partition in MB

$ sfdisk -l -uM

Disk /dev/vda: 102603 cylinders, 16 heads, 63 sectors/track

Units: 1MiB = 1024*1024 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start     End      MiB      #blocks            Id         System

/dev/vda1   *     1        500      500       512000            83        Linux

sfdisk:                            start: (c, h, s) expected (2, 0, 33) found (0, 32, 33)

sfdisk:                            end: (c, h, s) expected (1017, 14, 30) found (63, 221, 30)

/dev/vda2       501       2548   2048    2097152          82        Linux swap / Solaris

sfdisk:                            start: (c, h, s) expected (1017, 14, 31) found (63, 221, 31)

sfdisk:                            end: (c, h, s) expected (1023, 15, 63) found (324,242, 46)

/dev/vda3        2549    50499  47951   49101824       83        Linux

sfdisk:                            start: (c, h, s) expected (1023, 15, 63) found (324, 242, 47)

sfdisk:                            end: (c, h, s) expected (1023, 15, 63) found (1023, 254, 63)

/dev/vda4         0           –           0                       0          0          Empty

 

Parted

This command allows you to view the disk partitions details as well as it can modify the partitions too.

$ parted -l

Model: Virtio Block Device (virtblk)

Disk /dev/vda: 53.0GB

Sector size (logical/physical): 512B/512B

Partition Table: msdos

Disk Flags:

Number  Start             End                  Size                  Type                 File system     Flags

1         1049kB            525MB             524MB             primary           ext4                  boot

2          525MB            2673MB           2147MB           primary            linux-swap (v1)

3         2673MB           53.0GB             50.3GB             primary            ext4

 

lsblk

This command will give a list of all the storage blocks including the disk partitions and optical drives. Not only has it given details on the mount points, but also the size of the partitions.

$ lsblk

NAME              MAJ: MIN        RM       SIZE      RO       TYPE MOUNTPOINT

vda                   253:0                0         49.3G   0         disk

├─vda1            253:1                0         500M   0         part     /boot

├─vda2            253:2                0          2G         0         part     [SWAP]

└─vda3            253:3                0         46.8G   0          part     /

 

blkid

The file system type and attributes like universally unique identifiers (UUID) of block devices can be viewed by this command. Block device means the partitions and the storage media are available.

$ blkid

/dev/vda1: UUID=”b9a72937-9472-4a68-b962-23587ff8c6e8″ TYPE=”ext4″

/dev/vda2: UUID=”c3edc4d5-67c3-4b11-aa7f-fb37de3a4221″ TYPE=”swap”

/dev/vda3: UUID=”99d0ee67-b781-4654-82fb-3eb193613caf” TYPE=”ext4″

 

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