centos 建立swap交换缓存区

来源：互联网发布：人力资源管理知乎编辑：程序博客网时间：2024/06/05 02:03

选择想在哪个分区那个目录下建立分区文件如下命令则是/home/swap 建一个2G的分区文件

[root@mycentos home]# dd if=/dev/zero of=/home/swap bs=1024 count=2097152

2097152+0 records in
2097152+0 records out

2147483648 bytes (2.1 GB) copied, 6.21171 s, 346 MB/s

建完后看看

[root@household home]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/vda1 25778848 3858808 20609384 16% /

tmpfs 509984 0 509984 0% /dev/shm

格式化新建的分区

[root@household home]# mkswap /home/swap
mkswap: /home/swap: warning: don't erase bootbits sectors
on whole disk. Use -f to force.
Setting up swapspace version 1, size = 2097148 KiB

no label, UUID=a5d0f1f5-539b-4851-bba6-dc5c49356a45

把新建的分区变成swap分区

[root@household home]# swapon /home/swap

OK！

注:关闭SWAP分区命令为：# swapoff /home/swap

[root@household home]# free -m
total used free shared buffers cached
Mem: 996 934 61 0 1 518
-/+ buffers/cache: 415 580

Swap: 2047 0 2047

开机自动挂载swap

[root@household home]# echo "/home/swap swap swap defaults 0 0" >> /etc/fstab

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