Create a file for swap usage as shown below.
# dd if=/dev/zero of=/home/swap-fs bs=1M count=512
512+0 records in
512+0 records out
# ls -l /home/swap-fs
-rw-r–r– 1 root root 536870912 Jan 2 23:13 /home/swap-fs
Use mkswap to setup a Linux swap area in the /home/swap-fs file that was created above.
# mkswap /home/swap-fs
Setting up swapspace version 1, size = 536866 kB
Once the file is created and has been setup for Linux swap area, it is time to enable the swap using swapon as shown below.
# swapon /home/swap-fs
Add the following line to /etc/fstab and reboot the system for the swap to take into effect.
# vi /etc/fstab
/home/swap-fs swap swap defaults 0 0