Commands by cybertoast (2)

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

Find the package that installed a command

Copy structure
Clone directory structure without the files

Use a var with more text only if it exists
See "Parameter Expansion" in the bash manpage. They refer to this as "Use Alternate Value", but we're including the var in the at alternative.

Bare Metal IRC Client
Uses the extremely cool utilities netcat and expect. "expect" logs in & monitors for server PING checks. When a PING is received it sends the PONG needed to stay connected. IRC commands to try: HELP, TIME, MOTD, JOIN and PRIVMSG The "/" in front of IRC commands are not needed, e.g. type JOIN #mygroup Learn about expect: http://tldp.org/LDP/LGNET/issue48/fisher.html The sample output shows snippets from an actual IRC session. Please click UP button if you like it!

Pretty Print a simple csv in the command line
Splits the input based on commas and prints it in a nice column format. This would not work for CSV rows that have "," between quotes or with newline characters. Use only simple simple csv files.

Perl Command Line Interpreter
Can also just use the debug mode like this.

Look for IPv4 address in files.
It finds a SNMP OID too :-(

Copy the sound content of a video to an mp3 file
-vn removes tha video content, the copy option tells ffmpeg to use the same codec for generating the output

Given $PID, print all child processes on stdout
Simpler.


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