Create swap file
dd if=/dev/zero of=/swap.img bs=2048 count=1MBake swap file
mkswap /swap.imgAdd config to fstab
vim /etc/fstab
---
...
/swap.img swap swap sw 0 0
---Change permission for swap.img
chmod 0600 /swap.imgActivate swap
swapon /swap.imgDisable swap
swapoff -a