Commands by scw (3)

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Copy all shared libraries for a binary to directory
When working with jailed environments you need to copy all the shared libraries to your jail environment. This is done by running ldd on a binary which needs to run inside the jail. This command will use the output from ldd to automatically copy the shared libraries to a folder of your choice.

Calculate sum of N numbers (Thanks to flatcap)
replaces "\n" with "+"

Show a prettified list of nearby wireless APs

Check if a string is into a variable
Returns true (0) if the string is into $var, or false (1) if not.

calculate the total size of files in specified directory (in Megabytes)
the command will calculate the size of hidden files

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"

Re-emerge all ebuilds with missing files (Gentoo Linux)
This loops through all installed ebuilds and checks if every file that should be installed is still there and if not adds it to emerge. It includes a verbose output to stderr too. If you have packages installed that have whitespace in their filenames you have to change the IFS to "newline".

Find if $b is in $a in bash
Find if $b is in $a in bash

How many days until the end of the year

What is my public IP-address?
Very effective, use only DNS protocol. The @ part is optional if you already set opendns servers as default ns servers.


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