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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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All IP connected to my host
find all computer connected to my host through TCP connection.

Rename files in batch

Prepend a text to a file.
Syntax: $ prepend content to add [filename] Uses ed, so no temp files created.

Broadcast your shell thru ports 5000, 5001, 5002 ...
run 'nc yourip 5000', 'nc yourip 5001' or 'nc yourip 5002' elsewhere will produce an exact same mirror of your shell. This is handy when you want to show someone else some amazing stuff in your shell without giving them control over it.

Perl oneliner to print access rights in octal format
This prints file access rights in octal - useful when "stat" is unavailable.

External IP (raw data)

32 bits or 64 bits?
Easy and direct way to find this out.

Convert all files for iPhone with HandbrakeCLI

check open ports without netstat or lsof

Create an SSH connection (reverse tunnel) through your firewall.
Allows you to establish a tunnel (encapsulate packets) to your (Server B) remote server IP from your local host (Server A). On Server B you can then connect to port 2001 which will forward all packets (encapsulated) to port 22 on Server A. -- www.fir3net.com --


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