Create swap Partition

The swap partition in Linux is similar to the virtual memory in windows. It is used to separate some memory pages not used in the memory.
Replace an algorithm with a file system to free up more memory to run other programs.
When the physical memory of is very small, the system performance is generally improved by creating swap partitions.
A temporary partition file is created (all files in Linux ).
(1). Create a file of the specified size
Dd if =/dev/zero of = file name bs = 1 M (note: the unit is set here) count = 100 (Note: Here is the number, create 100 files with a size of 1 MB, that is, create a file with a size of MB)
(2) format the file as a swap partition:
Mkswap swap partition File
(3) Enable swap partition files
Swapon swap partition file (including full path)
(4) view usage
Free
(5) Disable swap partition files
Swapoff swap partition File
Instance:
Assume that a m swap partition file is created in the root directory.
Dd if =/dev/zero of =/swapfile bs = 1 M count = 100
Mkswap/swapfile
Swapon/swapfile
Free # view information
Swapoff/swapfile

Author: "huangyandong"