linux – most used disk directory
Sometimes system troble occur by the disk space problem. we can check root cause by some command.
Volume usage per partition
$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 482M 0 482M 0% /dev
tmpfs 492M 0 492M 0% /dev/shm
tmpfs 492M 516K 492M 1% /run
tmpfs 492M 0 492M 0% /sys/fs/cgroup
/dev/xvda1 9.0G 8.3G 798M 92% /
tmpfs 99M 0 99M 0% /run/user/1000
Most used disk directory
Under /
# du -s /* | sort -rn | head -10
4093372 /var
4069492 /usr
160072 /opt
53264 /etc
34652 /boot
7016 /home
548 /run
300 /root
4 /tmp
0 /sys
Under /var/
# du -s /var/* | sort -rn | head -10
1474252 /var/lib
1048576 /var/swpfile
997256 /var/log
390368 /var/cache
182480 /var/www
484 /var/opt
16 /var/spool
0 /var/yp
0 /var/tmp
0 /var/run
Check journal file size
Check size and delte files which are before 3 days
# journalctl --disk-usage
Archived and active journals take up 989.0M on disk.
# journalctl --vacuum-time=3d