php_installed=`dpkg -l | grep php| awk '{print $2}' |tr "\n" " "` # remove all php packge sudo aptitude purge $php_installed # use karmic for php pakage # pin-params: a (archive), c (components), v (version), o (origin) and l (label). echo -e "Package: php5\nPin: release a=karmic\nPin-Priority: 991\n" | sudo tee /etc/apt/preferences.d/php > /dev/null apt-cache search php5-|grep php5-|awk '{print "