Basically, an inode is used to identify each file on the filesystem. So running out of inodes generally means you’ve got a lot of small files laying around. Below you can find some commands to identify what directory has a large number of files in it.
df -i
This list inode usage of all partitions monted.
find / -xdev -printf '%h\n' | sort | uniq -c | sort -k 1 -nThis command will help you to identify what directory under “/” has a large number of files.