Question

A server running low on memory needs additional swap space, but all disk partitions are already allocated and cannot be repartitioned. As the administrator, you decide to add a 2 GB swap file at /swapfile that will be active immediately and remain enabled after reboot. Which sequence of commands correctly accomplishes this?

Accepted Answer

dd if=/dev/zero of=/swapfile bs=1M count=2048; chmod 600 /swapfile; mkswap /swapfile; swapon /swapfile; then add '/swapfile none swap sw 0 0' to /etc/fstab

Answer

fallocate -l 2G /swapfile; mount /swapfile /swap; swapon -a; then add '/swapfile /swap swap defaults 0 0' to /etc/fstab

Answer

mkswap -f /swapfile 2G; chmod 777 /swapfile; swapon --show; then add '/swapfile swap swap auto 0 0' to /etc/fstab

Answer

dd if=/dev/zero of=/swapfile bs=1M count=2048; swapon /swapfile; systemctl enable swapfile.service