Commands using chmod (95)

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Remove security limitations from PDF documents using ghostscript (for Windows)
#4345 also works under windows

exim statistics about mails from queue
statistics are sorted based on number of recipients.

Write comments to your history.
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Check a server is up. If it isn't mail me.
Joker wants an email if the Brand X server is down. Set a cron job for every 5 mins with this line and he gets an email when/if a ping takes longer than 3 seconds.

Search some text from all files inside a directory

xargs for builtin bash commands

Place the argument of the most recent command on the shell
This works if your terminal is in Vi mode

Kill google chrome process

Creat a tar file for backup info
Use tar command for a backup info with a date of creation

change ownership en masse of files owned by a specific user, including files and directories with spaces
In the example, uid 0 is root. foo:foo are the user:group you want to make owner and group. '.' is the "current directory and below." -print0 and -0 indicate that filenames and directories "are terminated by a null character instead of by whitespace."


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