Swap Partition And Swap File In RHEL 5

[root@server1 ~]#swapoff –a

[root@server1 ~]# fdisk /dev/hda

Create a new partition of 2*RAM and assign the id 82 which is allocated for swap partition.

[root@server1 ~]#mkswap –v1 /dev/hda15

-v1 switch is used for version number.

Add an entry in /etc/fstab file

[root@server1 ~]# vi /etc/fstab

/dev/hda15 swap swap defaults 0 0

:wq Activate the swap partition using

[root@server1 ~]#swapon –a

(which reads /etc/fstab and turns on all the swap entries in the list.

[root@server1 ~]# swapon –s (is used to check the status of swap partition.)

Creating a swap file

[root@server1 ~]#swapoff –a

[root@server1 ~]#dd if=/dev/zero of=swapfile bs=512M count=1

[root@server1 ~]#mkswap –v1 /root/swapfile

Add an entry in the /etc/rc.local

[root@server1 ~]#vi /etc/rc.local

Swapon /root/swapfile