Disk quotas represent the amount of disk space that you are allocated for your ECE Unix home directory. The standard disk quota for students is 1GB.
Checking your disk quota
Login to a Unix/Linux machine, either locally or remotely using a program such as SSH commands. Enter the command “quota -v” at the Unix prompt. The output will look something like this:
% quota -v Disk quotas for user joesmith (uid 12345): Filesystem blocks quota limit grace files quota limit grace /dev/vg01/lvol2 4164 35000 40000 228 0 0
Finding and removing expendable files
Use the “du” command as shown below to obtain a report of the number of kilobytes used in each directory of your account:
% du -k | sort -n 0 ./.Mathematica/4.0 0 ./.Mathematica/4.0/FrontEnd <...> <...> (several sub-directories omitted for clarity) <...> 4560 ./.mozilla/jsmith/3jo9meso.slt/Cache 6576 ./.mozilla/jsmith/3jo9meso.slt 6594 ./.mozilla/jsmith 7600 ./.mozilla
Note that the results are sorted in ascending order of disk usage. This example shows 4560KB in ./.mozilla/jsmith/3jo9meso.slt/Cache and that accounts for most of the 7600KB usage under ./.mozilla
Use the standard Unix commands for working with directories and files to navigate directories and delete any large expendable files. Prime candidates for removal are:
- “core” files. These huge program dumps are useless to most people.
- files in Cache directories
- compiled programs and .o files that you can recompile later if needed.