This article where the title is ‘How to Check hard disk Size in Linux’, as described in the title, it is an article which is written to show how to check the hard disk size in Linux operating system. It is utilizing a certain command available in the Linux operating system. The command is executed in the bash shell prompt. So, to be able to perform the command, either the operating system runs in GUI (Graphical User Interface) or in CLI (Command Line Interface), a terminal or any command line interface is needed.
Those commands are shown as follows :
1. lsblk
user@hostname:~$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 238,5G 0 disk ├─sda1 8:1 0 512M 0 part /boot/efi ├─sda2 8:2 0 230,1G 0 part / └─sda3 8:3 0 7,9G 0 part [SWAP] user@hostname:~$
Based on the manual page, lsblk can be thought of an abbrevation. It stands for list block device. It list the information about all available or specified block device if it is given as the parameter. So, if the given parameter for the command ‘lsblk’ is passed, the information provided will only list or print the specified block device. For an example :
user@hostname:~$ lsblk /dev/sda1 NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda1 8:1 0 512M 0 part /boot/efi user@hostname:~$
2. df -h
user@hostname:~$ df -h Filesystem Size Used Avail Use% Mounted on udev 3,9G 0 3,9G 0% /dev tmpfs 790M 89M 702M 12% /run /dev/sda2 227G 214G 1,2G 100% / tmpfs 3,9G 39M 3,9G 1% /dev/shm tmpfs 5,0M 4,0K 5,0M 1% /run/lock tmpfs 3,9G 0 3,9G 0% /sys/fs/cgroup /dev/sda1 511M 3,4M 508M 1% /boot/efi cgmfs 100K 0 100K 0% /run/cgmanager/fs tmpfs 790M 16K 790M 1% /run/user/120 tmpfs 790M 96K 790M 1% /run/user/1000 user@hostname:~$
The command specified output by printing or reporting the file system disk space usage. By given an additional parameter -h which is stands for –human-readable, it actually prints sizes in powers of 1024 as stated in the manual page of the command. It actually stated in powers of 1024 since the Kilobyte measurement is actually equals as 1024 bytes or 210. The above output printed as in Gigabyte which is in the powers of 1024, precisely 230 bytes. So, 1 Gigabyte is actually 220 Kilobytes. The size is rounded so that it can be easily read.
3. fdisk -l
user@hostname:~$ fdisk -l fdisk: cannot open /dev/ram0: Permission denied fdisk: cannot open /dev/ram1: Permission denied fdisk: cannot open /dev/ram2: Permission denied fdisk: cannot open /dev/ram3: Permission denied fdisk: cannot open /dev/ram4: Permission denied fdisk: cannot open /dev/ram5: Permission denied fdisk: cannot open /dev/ram6: Permission denied fdisk: cannot open /dev/ram7: Permission denied fdisk: cannot open /dev/ram8: Permission denied fdisk: cannot open /dev/ram9: Permission denied fdisk: cannot open /dev/ram10: Permission denied fdisk: cannot open /dev/ram11: Permission denied fdisk: cannot open /dev/ram12: Permission denied fdisk: cannot open /dev/ram13: Permission denied fdisk: cannot open /dev/ram14: Permission denied fdisk: cannot open /dev/ram15: Permission denied fdisk: cannot open /dev/sda: Permission denied user@hostname:~$
The command fdisk cannot be applied as the previous commands. It needs a superuser or root account in order to execute it. So, first of all, switch the user account to superuser or root account as shown below :
user@hostname:~$ sudo su - [sudo] password for user: root@hostname:~# fdisk -l Disk /dev/ram0: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram1: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram2: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram3: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram4: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram5: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram6: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram7: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram8: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram9: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram10: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram11: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram12: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram13: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram14: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/ram15: 64 MiB, 67108864 bytes, 131072 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk /dev/sda: 238,5 GiB, 256060514304 bytes, 500118192 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 Disklabel type: gpt Disk identifier: EF0FFD14-D3F5-4C7A-A1E3-A5E9D32AF376 Device Start End Sectors Size Type /dev/sda1 2048 1050623 1048576 512M EFI System /dev/sda2 1050624 483520511 482469888 230,1G Linux filesystem /dev/sda3 483520512 500117503 16596992 7,9G Linux swap root@hostname:~#
The above output command also displays the size of the storage.
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