In Linux, how does one modify the size of the SWAP zone?

Article Title: how to modify the size of the SWAP area in 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 classification I. view the current partition of the system:

> Free-m

2. Create a file for swap partition:

> Dd if =/dev/zero of =/whatever/swap bs = block_size count = number_of_block

3. Set swap partition files:

> Mkswap/whatever/swap

4. Enable swap partition file now:

> Swapon/whateever/swap

5. If you want to enable the function at startup, modify the swap lines in the file/etc/fstab:

/Whatever/swap defaults 0 0