教程： Centos7中添加、删除Swap交换分区的方法-腾讯云开发者社区-腾讯云
在CentOS 7上添加Swap交换空间_centos7 swap-CSDN博客
操作步骤
[root@TEST-A ~]# ls
install.sh logs nacos
[root@TEST-A ~]# swapon -s
[root@TEST-A ~]# free -g
total used free shared buff/cache available
Mem: 7 6 0 0 1 0
Swap: 0 0 0
[root@TEST-A ~]# df -Th /
Filesystem Type Size Used Avail Use% Mounted on
/dev/vda1 ext4 126G 51G 70G 43% /
[root@TEST-A ~]# fallocate -l 8G /swapfile
[root@TEST-A ~]# ls
install.sh logs nacos
[root@TEST-A ~]# cd
[root@TEST-A ~]# cd /
[root@TEST-A /]# ls
bin boot dev etc home lib lib64 lost+found media mnt opt patch proc root run sbin srv swapfile sys tmp usr var www
[root@TEST-A /]# ls -lh /swapfile
-rw-r--r-- 1 root root 8.0G Nov 9 12:07 /swapfile
[root@TEST-A /]# chmod 600 /swapfile
[root@TEST-A /]# ls -lh /swapfile
-rw------- 1 root root 8.0G Nov 9 12:07 /swapfile
[root@TEST-A /]# mkswap /swapfile
Setting up swapspace version 1, size = 8388604 KiB
no label, UUID=e0953e0b-2e828-2b39f2dbf046
[root@TEST-A /]# swapon /swapfile
[root@TEST-A /]# swapon -s
Filename Type Size Used Priority
/swapfile file 8388604 0 -2
[root@TEST-A /]# free -g
total used free shared buff/cache available
Mem: 7 6 0 0 1 0
Swap: 7 0 7
#开机启用
[root@TEST-A /]# nano /etc/fstab
-bash: nano: command not found
[root@TEST-A /]# vi /etc/fstab
