cd /var/dd if=/dev/zero of=swapfile bs=1024 count=524288
/sbin/mkswap swapfile/sbin/swapon swapfile
vi /etc/fstab
/var/swapfile swap swap defaults 0 0
cd /var/dd if=/dev/zero of=swapfile bs=1024 count=524288
/sbin/mkswap swapfile/sbin/swapon swapfile
vi /etc/fstab
/var/swapfile swap swap defaults 0 0