# fallocate -l 2G /swapfile
# chmod 600 /swapfile
# mkswap /swapfile
# swapon /swapfile
# cp /etc/fstab /etc/fstab.bak
# echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
# vi /etc/sysctl.conf
# vm.swappiness=10
# vm.vfs_cache_pressure=50
### Show memory space ###
# swapon --show
# free -h
### Check disk space ###
# df -h