At first run cat /etc/fstab and make sure you have the following line:
/dev/sda1 / ext3 defaults 1 1
/dev/sda2 none swap defaults 0 0
if no, run nano or any other text editor to edit /etc/fstab:
Preserve this line in the file:
none /dev/pts devpts rw 0 0
and add in :
/dev/sda1 / ext3 defaults 1 1
/dev/sda2 none swap defaults 0 0
save the file and reboot the VPS.
You should see your swap memory with value when run free -m
