交换文件和交换分区
时间:2015-12-20 16:28 来源:linux.it.net.cn 作者:IT
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：
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[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：
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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)
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+ 82 Linux swap / Solaris
2. 格式化/dev/sd5为swap分区类型
3. 验证，已经挂载成功
4. 修改Priority ，优先级的值在0-32767，值越高，优先级越高。
-p, --priority priority
Specify the priority of the swap device. priority is a value between 0 and 32767. Higher numbers indicate higher priority. See
swapon(2) for a full description of swap priorities. Add pri=value to the option field of /etc/fstab for use with swapon -a.
5. 交换文件
6. 修改交换文件的优先级
PS:需要注意的是，每新增交换分区或者交换文件的时候，priority都会发生变化，所有一新增，就需修改priority
(责任编辑：IT)
| 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：
1. 新建分区：
2. 格式化/dev/sd5为swap分区类型 3. 验证，已经挂载成功 4. 修改Priority ，优先级的值在0-32767，值越高，优先级越高。 -p, --priority priority Specify the priority of the swap device. priority is a value between 0 and 32767. Higher numbers indicate higher priority. See swapon(2) for a full description of swap priorities. Add pri=value to the option field of /etc/fstab for use with swapon -a. 5. 交换文件 6. 修改交换文件的优先级 PS:需要注意的是，每新增交换分区或者交换文件的时候，priority都会发生变化，所有一新增，就需修改priority (责任编辑：IT) |