Update Drupal on Ubuntu LAMP server

This is "how to" , Update Drupal on Ubuntu LAMP server.


#. 1
sudo apt-get install php-pear php5-gd -y
sudo pear channel-discover pear.drush.org
sudo pear install drush/drush

#. 2
sudo drush version
sudo pear upgrade drush/drush

#. 3
cd /var/www
sudo drush pm-enable update  // if update disabled
sudo drush up drupal
sudo chown -R www-data:www-data /var/www
sudo rm -rf *.txt