/home/1234$ quota -s
   Disk quotas for user 1234 (uid 1234):
        Filesystem   space   quota   limit   grace   files   quota   limit   grace
       cslab:/home   4519M*  4096M   5120M   09:47    6155       0       0

/home/1234$ du -mad 1
   ...
   936     total

lsof | grep username | grep deleted

lsof +L1 | grep username