this command will find the largest files on the system and list them in order
find / -mount -type f -ls | sort -rnk7 | head -30 | awk '{printf "%d MB\t%s\n",($7/1024)/1024,$NF}'
useful sometimes
du -hcx --max-depth=5 / | grep [0-9]G
*** free up some space ***
logrotate --force /etc/logrotate.d/* yum --enablerepo=’*’ clean all rm -rf /var/cache/yum
*** command that will report the size of deleted files that are open ***
lsof | head -n 1; lsof | grep deleted | sort -u -k8 | sort -nr -k7 | head -n 5
*** reducing the reserved block size ***
tune2fs -l... Reserved block count: ... Adjust Accordingly: tune2fs -m make sure to revert reserved blocks back to original setting