Paste the following code into a terminal on CentOS 8. It also works on CentOS 7 and will work on Red Hat 8, RHEL8, as well.
Where the first line has 4G, you can increase or decrease this number which refers to the size of the Swap RAM partition.
fallocate -l 4G /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile swapon -s echo '/swapfile swap swap sw 0 0' >> /etc/fstab
