centos 新建swap区文件
一. 相當詳細且流程完整，（推薦閱讀）
在centos7上新建swap區
https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-centos-7
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?二. centos官網
轉：https://www.centos.org/docs/5/html/5.2/Deployment_Guide/s2-swap-creating-file.html
5.2.3.?Creating a Swap File
To add a swap file:
Determine the size of the new swap file in megabytes and multiply by 1024 to determine the number of blocks. For example, the block size of a 64 MB swap file is 65536.
At a shell prompt as root, type the following command with?count?being equal to the desired block size:
dd if=/dev/zero of=/swapfile bs=1024 count=65536Setup the swap file with the command:
mkswap /swapfileTo enable the swap file immediately but not automatically at boot time:
swapon /swapfileTo enable it at boot time, edit?/etc/fstab?to include the following entry:
/swapfile swap swap defaults 0 0The next time the system boots, it enables the new swap file.
After adding the new swap file and enabling it, verify it is enabled by viewing the output of the command?cat /proc/swaps?or?free.
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