my system is full

 all my space is being eaten up on /. hmm. not here...  
   
 [root@fullsystem ~]# df -i  
 Filesystem                    Inodes  IUsed   IFree IUse% Mounted on  
 /dev/mapper/rhel-root              141920 137849   4071  98% /  
   
 [root@fullsystem ~]# du -x / | awk '{ if ($1 > 500000) { print $0} }'  
 755656 /usr/lib64  
 1567956 /usr/share  
 3222024 /usr  
 3431904 /  
 
 this is cool, too:
 [root@fullsystem ~]# du -xh / | egrep "[0-9]+G.?*|[5-9][0-9][0-9]M.*?" | sort -n  >> /tmp/space.sorted
 [root@fullsystem ~]# mail -s "space used" me@here < /tmp/space.sorted
  
 [root@fullsystem ~]# du -xh / | egrep "[0-9]+G.?*|[5-9][0-9][0-9]M.*?"  
 738M  /usr/lib64  
 1.5G  /usr/share  
 3.1G  /usr  
 3.3G  /  
   
 it is probably under an nfs mount...