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Mirror rubygems.org
https://github.com/rubygems/rubygems-mirror/issues/20

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

shut of the screen.

convert unixtime to human-readable
Mac have direct conversion of seconds (Epoch time)

display ip address
add this alias in .bashrc to fast check the ip address of your modem router alias myip="curl -s http://myip.dk | grep '' | sed -e 's/]*>//g'"

scan folder to check syntax error in php files

Show complete URL in netstat output
The -W switch of netstat makes it print complete URL of the connections, which otherwise by default is truncated to fit its default column size. Now to compensate for irregular column sizes, pipe the output to column (-t switch of column prints in tabular form). The only downside to this part is that the very first row, the header, goes pear shape.

Sort the size usage of a directory tree by gigabytes, kilobytes, megabytes, then bytes.
Probably only works with GNU du and modern perls.

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

Install pip with Proxy
Installs pip packages defining a proxy


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