Commands using fold (25)

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Alternative for basename using grep to extract file name
Here's a bash version.

Find the package that installed a command

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

save your current environment as a bunch of defaults

calculate how much bogomips one cpu core has (assuming you have 4 cores).
on some distro's you have to replace "BogoMIPS" with "bogomips".

Countdown Clock
The biggest advantage over atoponce's nifty original is not killing the scrollback. Written assuming bash, but shouldn't be terribly difficult to port to other shells. S should be multiple spaces, but I can't get commandlinefu to save/show them properly, any help?

A one-line web server in Ruby
Here's how to serve a directory in one line of Ruby. Handy for sharing files at a conference, for example.

Signals list by NUMBER and NAME

Multi line grep using sed and specifying open/close tags
Working with log files that contains variable length messages wrapped between open and close tags it may be useful to filter the messages upon a keyword. This works fine with GNU sed version 4.2 or higher, so pay attention to some unix distros (solaris, hp-ux, etc.). Linux should be ok.

Get your internal IP address and nothing but your internal IP address
Will return your internal IP address.


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