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List all NPM global packages installed

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Build an exhaustive list of maildir folders for mutt
Of course, you can adjust "Maildir" to your config...

rename files according to file with colums of corresponding names
Maybe simpler, but again, don't know how it will work with space in filename.

List the size (in human readable form) of all sub folders from the current location

Gathering all MAC's in your local network
replace eth0 with your ethernet or wireless network interface.

Kill a broken ssh connection
This is useful for example if you are on ssh in a server and the server goes down without letting you out. This is part of a larget sets of escape sequences provided by ssh. You can find them with ~? Here's the list: ~. - terminate connection (and any multiplexed sessions) ~B - send a BREAK to the remote system ~C - open a command line ~R - request rekey ~V/v - decrease/increase verbosity (LogLevel) ~^Z - suspend ssh ~# - list forwarded connections ~& - background ssh (when waiting for connections to terminate) ~? - this message ~~ - send the escape character by typing it twice (Note that escapes are only recognized immediately after newline.)

Check your unread Gmail from the command line
Checks the Gmail ATOM feed for your account, parses it and outputs a list of unread messages. For some reason sed gets stuck on OS X, so here's a Perl version for the Mac: $ curl -u username:password --silent "https://mail.google.com/mail/feed/atom" | tr -d '\n' | awk -F '' '{for (i=2; i

Compare an archive with filesystem
and you quickly know the files you changed

Find pages returning 404 errors in apache logs
Finds the top ten pages returning an http response code of 404 in an apache log.


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