Create the file.
This file will be 1024*524288 bytes. Generally it is a good
idea to create the swap file twice as big as the amount of
RAM that you have installed if you are under a 1 GB.
However, if you have larger amounts of RAM, it's best to run
your own tests with free to see how you're using the swap
file.
$ dd if=/dev/zero of=/swapfile0 bs=1024 count=524288
Step 2:
Setup the swap area on the file you created.
$ mkswap /swapfile0
Step 3:
Enable the file for swapping
$ swapon /swapfile0
Step 4:
Permanently enable the swap file on boot.
Add the following lines to /etc/fstab.
/swapfile0 swap swap defaults 0 0
Step 5:
Check that the swap file is working the the free command. Also,
reboot too to make sure the swap file works on restart and that
/etc/fstab was correctly configured.
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