Some useful commands to check disk space in Linux

In the process of using VPS or linux Server you will need to check which drive or directory leads to full space, but not everyone knows how to check. So today BKNS will guide you to use some commands. Useful to check.

1. Check the total capacity of the system.

Command " df ” displays information about the device name, total blocks, total disk space, used disk space, available disk space, and mount points on the file system.

[root@bkns ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        3.9G     0  3.9G   0% /dev
tmpfs           3.9G     0  3.9G   0% /dev/shm
tmpfs           3.9G  8.8M  3.9G   1% /run
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1        40G  5.3G   35G  14% /
/dev/sdb1        16G   45M   15G   1% /backups
tmpfs           783M     0  783M   0% /run/user/0

2. Display information about all file system disk space usage

Same as above, but it also shows file system information along with all their file system disk usage and memory usage.

[root@bkns ~]# df -a
Filesystem     1K-blocks    Used Available Use% Mounted on
sysfs                  0       0         0    - /sys
proc                   0       0         0    - /proc
devtmpfs         3993604       0   3993604   0% /dev
securityfs             0       0         0    - /sys/kernel/security
tmpfs            4004184       0   4004184   0% /dev/shm
devpts                 0       0         0    - /dev/pts
tmpfs            4004184    8988   3995196   1% /run
tmpfs            4004184       0   4004184   0% /sys/fs/cgroup
cgroup                 0       0         0    - /sys/fs/cgroup/systemd
pstore                 0       0         0    - /sys/fs/pstore
cgroup                 0       0         0    - /sys/fs/cgroup/cpuset
cgroup                 0       0         0    - /sys/fs/cgroup/cpu,cpuacct
cgroup                 0       0         0    - /sys/fs/cgroup/memory
cgroup                 0       0         0    - /sys/fs/cgroup/perf_event
cgroup                 0       0         0    - /sys/fs/cgroup/pids
cgroup                 0       0         0    - /sys/fs/cgroup/net_cls,net_prio
cgroup                 0       0         0    - /sys/fs/cgroup/blkio
cgroup                 0       0         0    - /sys/fs/cgroup/devices
cgroup                 0       0         0    - /sys/fs/cgroup/freezer
cgroup                 0       0         0    - /sys/fs/cgroup/hugetlb
configfs               0       0         0    - /sys/kernel/config
/dev/sda1       41931776 5530360  36401416  14% /
systemd-1              0       0         0    - /proc/sys/fs/binfmt_misc
mqueue                 0       0         0    - /dev/mqueue
hugetlbfs              0       0         0    - /dev/hugepages
debugfs                0       0         0    - /sys/kernel/debug
/dev/sdb1       16381820   45080  15481548   1% /backups
tmpfs             800840       0    800840   0% /run/user/0

3. Display information of /home File System

To view the information of /home use the following command:

[root@bkns ~]# df -hT /home
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/sda1      xfs    40G  5.3G   35G  14% /

4. Show the total size of the folder

Check the size of the folder /home/

[root@bkns ~]# du -sh /home/
40G     /home/

5. Show drive partitions.

[root@bkns ~]# fdisk -l

Disk /dev/sdb: 17.2 GB, 17179869184 bytes, 33554432 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: 0x06f3e4a6

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048    33554431    16776192   83  Linux

Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x000adf75

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048    83886079    41942016   83  Linux

6. Search for 10 files/folders taking up space in VPS/Server

[root@bkns~]# du -a /var/ | sort -n -r | head -10
663516  /var/
412928  /var/lib
253356  /var/lib/mysql
239616  /var/lib/mysql/ibdata1
145940  /var/lib/rpm
136584  /var/lib/rpm/Packages
127824  /var/log
122708  /var/cache
121360  /var/cache/yum/x86_64/7
121360  /var/cache/yum/x86_64

So BKNS has guided you to use some commands to manipulate disk space check in linux.