Steps to do this.
Download file
$ wget
http://www.mediafire.com/download/65...ository.sh.txt
2. Save this file in /usr/sbin/
$ cp /root/Downloads/add-apt-repository.sh.txt /usr/sbin/add-apt-repository
3. Change permissions to execute
$ chmod o+x /usr/sbin/add-apt-repository
4. Change ownership to root
$chown root:root /usr/sbin/add-apt-repository
5. Now when ever you need to execute command type
$ sudo add-apt-repository ppa: ppa - name
Disclaimer: I know adding ppa can have adverse effects on debian machines
Opening this script to larger audience so that we can crowdsource efforts if someone likes it.
good luck!!!