Both Emacs and TeX create backup copies of whatever file you're working on. These don't get automatically removed when you save a new version of a file and can eat up alot of space. Try removing these files.
gzip any large files or directories that aren't accessed regularly. This compresses the files thereby reducing the amount of space they take up. The basic syntax for gzip is: gzip <filename>. Files that have been gzipped will have a .gz extension after the filename. For further info on using gzip see the man page.
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This page was last updated on July 28, 1999. Questions, suggestions, and general grumpings should be sent to webmaster@math.okstate.edu.