How to Create a Swap Partition for Rocky/RHEL/CentOS

Note: $THIS_IS_A_VARIBLE

Create

1. Check Memory Space – to check how much you need to add.

free -m

2. Create a Swap File

dd if=/dev/zero of=SWAPFILE_DIRECTORY bs=1M count=SPACE(MB)

The unit of “count” changes as “bs”.

3. Format the Swap File

mkswap $SWAPFILE_DIRECTORY
chmod -R 600 $SWAPFILE_DIRECTORY

4. Turn on/off Swap

swapon $SWAPFILE_DIRECTORY

5. Enable it when boot

vim /etc/fstab

# Add this in the file
$SWAPFILE_DIRECTORY swap swap defaults 0 0

Turn off/Disable

swapoff $SWAPFILE_DIRECTORY
swapoff -a # Turn off all

vim /etc/fstab

# Delete/Comment out this in the file
$SWAPFILE_DIRECTORY swap swap defaults 0 0