Create swap for ubuntu

[manimj]

cd /var
sudo touch swap.img
sudo chmod 600 swap.img
sudo dd if=/dev/zero of=/var/swap.img bs=1024k count=2000
sudo mkswap /var/swap.img
sudo swapon /var/swap.img
sudo free
sudo echo "/var/swap.img none swap sw 0 0" >> /etc/fstab
cd