Hack 69. Create a swap file system.

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.

/home/swap-fs swap swap defaults 0 0

Comments on this entry are closed.

  • Ramkumar April 7, 2012, 2:35 am

    Hi Ramesh,

    After adding line to /etc/fstab.
    why do we need to reboot the machine?
    can we use partprobe instead of reboot?
    kindly explain it