Find Biggest Files and Directories on Linux
Here's a handy command for tracking down which part of your file system has the largest files in Linux.
du -a / | sort -n -r | head -n 5
Linux can be a tricky beast sometimes and it only takes one rogue process, one giant log file, or one run away user upload to eat your disc and bring the server to a grinding halt.
To check how you're doing for disc space, you can check