交换文件和交换分区

交换分区步骤说明:新建分区-类型选择swap类型—>kpartx –a /dev/sda5àmkswapàblkid /dev/sda5àswapon –help—>/etc/fstab
命令解释：

[root@yangcan ~]# swapon --help

Usage:

swapon -a [-e] [-v] [-f] enable all swaps from /etc/fstab

swapon [-p priority] [-v] [-f] <special> enable given swap

swapon -s display swap usage summary

swapon -h display help

swapon -V display version

The <special> parameter:

{-L label | LABEL=label} LABEL of device to be used

{-U uuid | UUID=uuid} UUID of device to be used

<device> name of device to be used

<file> name of file to be used

1. 新建分区：

Command (m for help): n

First cylinder (3005-3916, default 3005):

Using default value 3005

Last cylinder, +cylinders or +size{K,M,G} (3005-3916, default 3916): +1G

Command (m for help): p

Disk /dev/sda: 32.2 GB, 32212254720 bytes

255 heads, 63 sectors/track, 3916 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk identifier: 0x00092856

Device Boot Start End Blocks Id System

/dev/sda1 * 1 39 307200 83 Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2 39 2354 18598912 83 Linux

/dev/sda3 2354 2611 2064384 82 Linux swap / Solaris

/dev/sda4 2611 3916 10483750 5 Extended

/dev/sda5 2611 2742 1053563+ 83 Linux

Command (m for help): t

Partition number (1-7): 5

Hex code (type L to list codes): 82

Changed system type of partition 5 to 82 (Linux swap / Solaris)