Create swapfile

gistfile1.txt

SIZE=4; sudo dd if=/dev/zero of=/swapfile bs=1024 count=`expr $SIZE \* 1024000` && sudo mkswap /swapfile && sudo sh -c 'echo "/swapfile    none    swap sw 0 0" >> /etc/fstab' && sudo chmod 600 /swapfile && sudo swapon /swapfile;