Category Archives: Uncategorized

How to install the VirtualBox Extension Pack from the Command Line on Ubuntu

Posted on April 21, 2013 by Ahmed Tawfik

The following command was needed after upgrading the VirtualBox version to install the new version of the extension pack and replace the old one: sudo VBoxManage extpack install –replace Oracle_VM_VirtualBox_Extension_Pack-4.2.12-84980.vbox-extpack

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How to manually install a Gnome Shell extension

Posted on April 14, 2013 by Ahmed Tawfik

This is a must-know for those who love some old extensions that are no longer compatible with their new upgrade of gnome shell, since many extensions are already compatible with the new versions of the gnome-shell, but all what differs … Continue reading →

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How to extract a number from a string (not a file) in Bash

Posted on April 10, 2013 by Ahmed Tawfik

export hobba=ksjdjf123ksks export nokka=`sed “s/[^0-9]//g” <<< $hobba` echo $nokka 123 Sources: http://stackoverflow.com/questions/13055889/sed-with-a-literal-string-not-input-file, http://stackoverflow.com/questions/6388046/extract-integer-from-string-using-bash

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How to debug your bash script

Posted on April 7, 2013 by Ahmed Tawfik

Simply supply the -x parameter, e.g. bash -x myscript.sh

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How to change your hostname in Ubuntu without restarting

Posted on March 11, 2013 by Ahmed Tawfik

Replace your old hostname in the /etc/hostname file with the new one: “sudo vi /etc/hostname” Replace your old hostname beside the 127.0.0.1 in the /etc/hosts file Run the following “sudo service hostname start” Exit the terminal and open a new … Continue reading →

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