How to create a swap file.
A 2GB swap file.
dd if=/dev/zero of=/swapfile bs=1k count=2048k |
Activate.
mkswap /swapfile chmod 0600 /swapfile systemctl daemon-reload swapon /swapfile |
To make swap permanent, add to /etc/fstab.
/swapfile swap swap defaults 0 0 |
Check if swap is working.
cat /proc/swaps free -h |