Out of inodes: file write error (No space left on device)

1. df -hi
1. proves you are out of inodes or not
2. cause is most likely tons of small files in some "problem directory", poke around
2. find <random_dir> -type f | wc -l
1. give a count of file in that subdir
2. common problem dirs
1. /var/spool/<XYZ>
2. /tmp
3. find <problem_dir> -type f -delete
1. deletes one file at a time
2. rm will get stuck finding files first if you use wildcard like *