23.22 Using find to Clear Out Unneeded Files

Do you run find on your machine every night? Do you know what it has to go through just to find out if a file is three days old and smaller than 10 blocks or owned by "fred" or setuid root? This is why I tried to combine all the things we need done for removal of files into one big find script:

2>&1

#! /bin/sh # # cleanup - find files that should be removed and clean them # out of the file system. find / \( \( -name '#*' -atime +1 \) \ -o \( -name ',*' -atime +1 \) \ -o \( -name rogue.sav -atime +7 \) \ -o \( \( -name '*.bak' \ -o -name '*.dvi' \ -o -name '*.CKP' \ -o -name '.*.bak' \ -o -name '.*.CKP' \) -atime +3 \) \ -o \( -name '.emacs_[0-9]*' -atime +7 \) \ -o \( -name core \) \ -o \( -user guest -atime +9 \) \ \) -print -exec rm -f {} \; > /tmp/.cleanup 2>&1

[This is an example of using a single find command to search for files with different names and last-access times (see article 17.5). As Chris points out, doing it all with one find is much faster, and less work for the disk, than running a lot of separate finds. The parentheses group each part of the expression. The neat indentation makes this big thing easier to read. The -print -exec at the end removes each file and also writes the filenames to standard output, where they're collected into a file named /tmp/.cleanup-people can read it to see what files were removed. You should probably be aware that printing the names to /tmp/.cleanup lets everyone see pathnames, like /home/joe/personal/resume.bak, that some people might consider sensitive. Another thing to be aware of is that this find command starts at the root directory; you can do the same thing for your own directories. -JP ]