To add a swap file post install (i.e. you don't have a free partition to dedicate to swap):
dd if=/dev/zero of=/swap/swapfile bs=1024 count=(number of blocks to get to your desired swap size) mkswap /swap/swapfile Setting up swapspace version blah, size = blah no label, UUID=uuid-from-mkswap-command chmod 0600 /swap/swapfile swapon /swap/swapfile swapon -s (see that it is in use). free -m (chuck this in /etc/fstab for reboots): /swap/swapfile none swap sw 0 0 alternatively by UUID: UUID=uuid-from-mkswap-above none swap sw 0 0 - probably good to test with a: mount -a (and correct mistakes before any reboot)... - looks like you might get: mount: swap: can't find UUID=blahhhhh sometimes, so huh, not sure. Systemd? Nah. So probably use abs location, even though uuid would be "futuristic". done!