Please help. My file system is 100%, I can't seem to find what is taking so much space. The total hard drive space is 150Gig free but I got nothing now.

I did to this to find the big file but it's taking so much time. Is there any other way?

 
du -ah / | more
 
find ./ -size +200M -exec du -h {} \;

The usual culprits are often in /var/, unless /var/ is its own partition on your system.

If you have lsof, this can help show you which files are actually open. So can ls -l /proc/[0-9]*/fd/ on some systems, particularly linux.

Beware -- do not simply delete the problem file when you find it! If it's still held open by anything, it will not be removed from disk, just removed from the directory -- forcing you to kill processes or reboot to close the file and fix the problem.

Truncate the file instead, i.e. : > filename to reduce it to zero bytes in size.

                       
  sudo  find / -type f -size +20000k -exec ls -lh {} \; | awk '{ print $9 ": " $5 }'

Thank you so much for your help. I was able to find huge tar file, which I was able to remove. But it's still tight, I need to add more space to this server. Move all the old log files to new system.