Manually create and delete SWAP files in LINUX

How to manually create and delete SWAP files in LINUX: 1. determine the size of the swap file, in MB. Multiply the value by 1024 to obtain the block size. For example, the block size of a 64 MB swap file is 65536. 2. at the root prompt, type the following command, where count is equal to the required block size: dd if =/dev/zero f =/swapfile bs = 1024 count = 655363. create a swap file: mkswap/swapfile4. open the swap file immediately instead of automatically enabling it at startup: swapon/swapfile5. to enable it at startup, add the following content to/etc/fstab: /swapfile swap defaults 0 0 the next time the system starts, the new swap file is opened. 6. After adding a new swap file and enabling it, check the output of cat/proc/swaps or the free command to check whether swap is enabled. 7. Delete SWAP partition swapoff/swapfile Modify/etc/fstab file rm-rf/swapfile 1 block = 512 bytes