Disk partition /var/log has only 4% free

This is how to get some more info on what files are eating up your harddrive. The

du -x . | sort -n

command forces the

du

(disk usage) command to limit itself to the /var/log partition. The

sort

command will sort the output of du to display from smallest to largest files. In the example below you can see that the directory /var/log itself usages the most disk space.

[root@nielsvs-bigip:Active:Standalone] ~  cd /var/log
[root@nielsvs-bigip:Active:Standalone] log  du -x . | sort -n
2       ./ConsoleKit
2       ./fpuserd
...
...
...
1006    ./restnoded
1644    ./avr
2005    ./datasync
12600   ./ts
14520   ./sa6
27363   ./auditd
109245  .
[root@nielsvs-bigip:Active:Standalone] log  ls -lh auditd
total 27M
-rw-------. 1 root root 2.7M 2017-03-09 15:22 audit.log
-r--------. 1 root root 6.1M 2017-03-08 16:05 audit.log.1
-r--------. 1 root root 6.1M 2017-03-06 10:20 audit.log.2
-r--------. 1 root root 6.1M 2017-03-04 04:30 audit.log.3
-r--------. 1 root root 6.1M 2017-03-01 22:32 audit.log.4
[root@nielsvs-bigip:Active:Standalone] log 

You can also sort on the largest files in de /var/log directory itself.

[root@nielsvs-bigip:Active:Standalone] log  ls -Slh | head -10
total 46M
-rw-------. 1 root      root       21M 2017-03-09 15:16 ltm
-rw-r--r--. 1 root      root      7.6M 2017-02-28 21:35 restjavad-audit.0.log
-rw-------. 1 root      root      7.1M 2017-03-09 03:06 ltm.1
-rw-r--r--. 1 root      root      1.1M 2017-01-01 10:34 restjavad-gc.log.0
-rw-r--r--. 1 root      root      978K 2017-02-28 21:32 restjavad.1.log
-rw-r--r--. 1 root      root      732K 2017-02-24 11:19 debug.log
-rw-------. 1 root      root      539K 2017-03-02 03:29 ltm.9.gz
-rw-rw-r--. 1 root      tomcat    448K 2017-03-06 14:08 webui.log
-rw-------. 1 root      root      432K 2017-03-09 03:02 icrd.1
[root@nielsvs-bigip:Active:Standalone] log 

Maybe you can remove some old logfiles or make sure you turn off some debugging to log less.