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Show current network interface in use

vim insert current filename
insert filename Normal mode: "%p Insert mode: %

Watch active calls on an Asterisk PBX
Only the number of calls nothing else.

Limit the cpu usage of a process
This will limit the average amount of CPU it consumes.

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Remove spaces from filenames - through a whole directory tree.
An example of zsh glob qualifiers.

Decode base64-encoded file in one line of Perl
If you are in an environment where you don't have the base64 executable or MIME tools available, this can be very handy for salvaging email attachments when the headers are mangled but the encoded document itself is intact.

Browse shared folder when you're the only Linux user
Under Ubuntu smbclient is part of the samba package. With the version I use (3.0.28a) cd-ing into folders with spaces in the name is a drag. You have to put the folder name in quotes: smb: \Shared\> cd "Marketing and PR"

determine if tcp port is open
for udp nmap -sU -p 80 hostname

Find all files containing a word
shorter :p


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