[root@kicker root]# fdisk /dev/sda

Command (m for help): d
Selected partition 1

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-992, default 1): 1
Last cylinder or +size or +sizeM or +sizeK (1-992, default 992): +32M

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 82
Changed system type of partition 1 to 82 (Linux swap)

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@kicker root]# mkswap /dev/sda1
Setting up swapspace version 1, size = 32223 kB
[root@kicker root]# swapon /dev/sda1
[root@kicker root]# free
             total       used       free     shared    buffers     cached
Mem:        125968     115520      10448          0      20060      24248
-/+ buffers/cache:      71212      54756
Swap:       560624      83040     477584
[root@kicker root]# swapoff /dev/sda1
[root@kicker root]# free
             total       used       free     shared    buffers     cached
Mem:        125968     115520      10448          0      20084      24244
-/+ buffers/cache:      71192      54776
Swap:       529160      83040     446120
[root@kicker root]#