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Use tagged vlans
Great for sysadmins! Don't forget to pass the vlan to your port in a manageable switch. After vconfig, you should use $sudo ifconfig eth0.[VID] up Now the interface is up, you can use dhclient or ifconfig again to get an ip address.

Print diagram of user/groups
Parses /etc/group to "dot" format and pases it to "display" (imagemagick) to show a usefull diagram of users and groups (don't show empty groups).

Watch active calls on an Asterisk PBX
Works on asterisk 1.8.

list files recursively by size

Monitor cpu freq and temperature
This is maybe helpfull from system overheat on your linux box

Remove a range of lines from a file
Deletes lines to of a file. You must put the end line first in the range for the curly brace expansion, otherwise it will not work properly.

Greets the user appropriately

convert unixtime to human-readable with awk
- convert unixtime to human-readable with awk - useful to read logfiles with unix-timestamps, f.e. squid-log: sudo tail -f /var/log/squid3/access.log | awk '{ print strftime("%c ", $1) $0; }

the same as [Esc] in vim
Faster and more convinent than [Esc]

Recursively create a TAGS file for an entire source tree. TAGS files are useful for editors like Vim and Emacs


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