Linux 7.7设置交换分区SWAP

1. 创建交换分区文件

[[email protected] wxadmin]# dd if=/dev/zero of=/opt/swapfile bs=1M count=4096  
4096+0 records in
4096+0 records out
4294967296 bytes (4.3 GB) copied, 20.789 s, 207 MB/s

2. 给文件授权

[[email protected] wxadmin]# chmod 600 /opt/swapfile

3. 格式化交换分区

[[email protected] wxadmin]# mkswap /opt/swapfile 
Setting up swapspace version 1, size = 4194300 KiB
no label, UUID=bfe83644-0fa0-43f9-bf7e-69f9e24b391f

4. 开启交换分区

[[email protected] wxadmin]# swapon /opt/swapfile

5. 查看交换分区状态

[[email protected] wxadmin]# free -m
              total        used        free      shared  buff/cache   available
Mem:           3789        2682         208         280         898         586
Swap:          4095           0        4095
[[email protected] wxadmin]#