查看swap
# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 0 -1
使用dd妇斤，創(chuàng)建swap文件栗涂。
# dd if=/dev/zero of=/var/swap bs=1024 count=4096000
4096000+0 records in
4096000+0 records out
4194304000 bytes (4.2 GB) copied, 36.1435 s, 116 MB/s
格式化swap
# mkswap /var/swap
mkswap: /var/swap: warning: don't erase bootbits sectors
on whole disk. Use -f to force.
Setting up swapspace version 1, size = 4095996 KiB
no label, UUID=4e1b22dc-8318-462b-bee3-28b3a18a16c0
掛載swap文件知牌，并查看。
# swapon /var/swap
# swapon -s
Filename Type Size Used Priority
/dev/dm-1 partition 2097148 0 -1
/var/swap file 4095996 0 -2
編輯fstab斤程，重啟機(jī)器swap文件也生效角寸。
# vim /etc/fstab
/var/swap swap swap defaults 0 0
