Swap partition

what is swap partition? – portion of hard disk space is used as RAM. useful for system which has less RAM and still want to run large programs.

How to create swap memory in linux?

• create a empty file of required swap size
  dd if=/dev/zero of=/swap-file bs=1k count=65536
  swap memory = count*bs = 65536*1k = 64 MB
  
• convert this file into a swap file format
  mkswap /swap-file 65536
  
• enable swap file system
  swapon /swap-file