/dev/mapper/centos_server2-root is full - centos

Question

i have a problem with centOS and DirectAdmin,
i can't login to panel, because not space available for create session
when i run df -h command, get the following result:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos_server2-root 50G 50G 20K 100% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 8.6M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sda1 1014M 143M 872M 15% /boot
/dev/mapper/centos_server2-home 192G 124G 68G 65% /home
tmpfs 1.6G 0 1.6G 0% /run/user/0
how i can free up /dev/mapper/centos_server2-root ?

Answer 1

You can remove the old logs from your system.
For removing old log files, are your logs being rotated, e.g. do you have /var/log/messages, /var/log/messages.1, /var/log/messages.2.gz, etc, or maybe /var/log/messages-20101221, /var/log/messages-20101220.gz, etc?
The obvious way to remove those is by age, e.g.
# find /var/log -type f -mtime +14 -print
# find /var/log -type f -mtime +14 -exec rm '{}' \;
Found out here https://serverfault.com/questions/215179/centos-100-disk-full-how-to-remove-log-files-history-etc (by mikel)
Note: Use the rm command with cautious.