How to check disk files issues: inode exceeded

Check inode through:
df -i

To count all the files in a directory and all it's subdirectories:

$ for i in /*; do echo $i; find $i | wc -l; done

Then you can narrow down your search by replacing the /* for any directory that has an unusually large number of files in. For me it was /var

$ for i in /var/*; do echo $i; find $i | wc -l; done

Delete when rm fails:

 find . -mtime +2 -name '*' -delete