Enabling SWAP file on Linux

when installing passwork on linux, it is recommended to enable swap if only 2 4 gb of ram is available on the system enabling a swap /bin/dd if=/dev/zero of=/var/swap 1 bs=1m count=5120 chmod 600 /var/swap 1 /sbin/mkswap /var/swap 1 /sbin/swapon /var/swap 1 disable swap /sbin/swapoff /var/swap 1 rm rf /var/swap 1