Commands using fgrep (8)

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list block devices
Shows all block devices in a tree with descruptions of what they are.

A very simple and useful stopwatch
time read -sn1 (s:silent, n:number of characters. Press any character to stop)

Rename files in batch

preprocess code to be posted in comments on this site
Assuming that $script contains the filename of a script you'd like to post as part of a comment on this site, this will prefix each line with '$' and pipe it into the X selection. From there just put the cursor in the right place in the comments box and middle-click. Should work pretty much anywhere with xclip installed. On debian-ish systems this is installed as part of the package "xclip".

grep -v with multiple patterns.
Use multiple patterns with grep -v. So you can print all lines in a file except those containing the multiple patterns you specify.

list block devices
Shows all block devices in a tree with descruptions of what they are.

Show crontabs for all users
added echo "### Crontabs for $user ####"; to make clear whose crontab is listed.

Stoppable sleep
A nice way to interrupt a sleep with a signal.

check open ports without netstat or lsof

Check the age of the filesystem
Very useful set of commands to know when your file system was created.


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