CentOS An example of adding a swap partition

Create a swap partition using the DD command

[Root@localhost Desktop] #dd if=/dev/zero of=/home/swap bs=1024 count=1048576

Calculated formula for Count: count=size*1024 (SIZE in MB)

This creates a/home/swap partition file with a size of 1G, and then you need to format the new swap partition:

[Root@localhost desktop]# Mkswap/home/swap


Then use the Swapon command to turn this file partition into a swap partition.

[Root@localhost Desktop] #swapon/home/swap
(Turn off the swap command: [root@localhost Desktop] #swapoff/home/swap)

With Free-m, you can see that the swap is enlarged.



To enable swap to mount automatically, modify the/etc/fstab file

Vi/etc/fstab

At the end of the file, add

/home/swap Swap default 0 0
This way, the swap partition is not manually mounted, even if the system is restarted.