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QUICK GUIDE: Clearing Disk Space

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NCDU is a command line tool that can be used to review disk usage across a filesystem.

ncdu /

Note: You can specify a directory other than /. ie if you wanted to review the contents of /var, you would format the command as follows:

ncdu /var

We can also use the find command to locate files over a specified size.

find / -type f -size +300M > filelist.txt  

The above command would search / (and all subdirectories) for any files over 300M in size. There are various options available for size specification:  

  • G-> for gibibytes  

  • M-> for megabytes  

  • K-> for kibibytes  

  • b-> for bytes  

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/var/log/journal - this can be vacuumed to reduce the size:  

journalctl --vacuum-size=500M 

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