Manually add SWAP space for Linux

Article Title: manually add SWAP space for Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories, how to manually add SWAP space when SWAP space is insufficient

The following operations must be performed under the root user. First, create a partition and run the dd command, such

Dd if =/dev/zero of =/home/swap bs = 1024 count = 512000

This will create a partition file such as/home/swap. The file size is 512000 blocks. Generally, 1 block is 1 K, so the space is mb. Then, the partition is changed to a swap partition.

/Sbin/mkswap/home/swap

Then use the swap partition. Make it valid.

/Sbin/swapon/home/swap

Now, run the free-m command to check the memory and swap partition size, and we can see that the space is increased by MB. However, after the computer is restarted, it is found that swap is still so large, the new swap is not automatically started, and manual start is required. Modify the/etc/fstab file and add the following line:

/Home/swap defaults 0 0

You will find that swap space increases after your machine is automatically started.