How to Process Large Files … ? Large is a variable Term, 700 GB is large for me, while it could be a small peace for others. Assuming you need to count the lines … this simple Task can take minutes ! Size [user@host /tmp]$ du -sh bigfile 745G bigfile Wordcount -> 10 min if you need to count the lines, use the wordcount command and you get the exact number … but you have to wait for minutes, depending in your disk subsystem and the file size of course