Empties all files in /var/log over 5000k. Useful if /var goes crazy or if you just haven't cleaned up in a while.
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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find /var/log -type f -size +5000k -exec cp /dev/null {} \;
this will invoke cp once for each file, copying /dev/null to it. They syntax of -exec just replaces {} with the name of each file found and runs cp. If you were just deleting those files, you could use the -delete option in place of -exec. See the "ACTIONS" section of the find manpage for more.