SWAP create

ext4

4G swafile

fallocate -l 4G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile swap swap defaults 0 0' >>  /etc/fstab

fallocate -l 2G /swapfile; chmod 600 /swapfile; mkswap /swapfile; swapon /swapfile; echo '/swapfile swap swap defaults 0 0' >>  /etc/fstab

xfs

1G swapfile

dd if=/dev/zero of=/swapfile bs=1024 count=1048576
chown root:root /swapfile
chmod 0600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile none swap sw 0 0' >> /etc/fstab

dd if=/dev/zero of=/swapfile bs=2048 count=1048576; chown root:root /swapfile; chmod 0600 /swapfile; mkswap /swapfile; swapon /swapfile; echo '/swapfile none swap sw 0 0' >> /etc/fstab