Let us assume you already figured out where your disk space went.
Cleaning up disk space is easy: You just delete stuf, right?
Well.. Mostly. There are a couple of things to watch out for:
- Deleting important stuff is ... bad. You still want a working system, right?
- Deleting files that are in use will not free up the disk space until processes close the files.
Cleaning Out Log Files
Often, the culprit will be a log file that has grown beyond expectations: so you have two options:
Stop the process writing to the log file, remove the log file, and start the process again. Obviously this implies that some (important?) service will be down for a short time. You will have to decide whether the downtime is acceptable.
Simply truncate the log file with the smiley of death:
This makes use of the colon shell command - which is a no-op. Some people prefer to use the much-long-to-type command:
echo > /path/to/offending-file
which not only is much longer to type, but also puts a newline in the file. Why bother!?