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建立一个普通的Linux分区（主分区、逻辑分区均可）
[pre]
fdisk /dev/sdb
Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x740e36e3
Device Boot Start End Blocks Id System
/dev/sdb1 63 4194367 2097152+ 83 Linux
/dev/sdb2 4194368 16777215 6291424 5 Extended
/dev/sdb5 4194431 8388735 2097152+ 83 Linux
/dev/sdb6 8388799 16777215 4194208+ 83 Linux
[/pre]
以sdb6为例，可以看到分区的十六进制编码是83，即普通的Linux分区。
修改分区类型的十六进制编码
[pre]
//t命令：改写分区十六进制编码
Command (m for help): t
Partition number (1-6): 6
//L命令可以查看不同分区的十六进制编码，交换分区为82
Hex code (type L to list codes): 82
Changed system type of partition 6 to 82 (Linux swap / Solaris)
Command (m for help): p
Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders, total 16777216 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x740e36e3
Device Boot Start End Blocks Id System
/dev/sdb1 63 4194367 2097152+ 83 Linux
/dev/sdb2 4194368 16777215 6291424 5 Extended
/dev/sdb5 4194431 8388735 2097152+ 83 Linux
/dev/sdb6 8388799 16777215 4194208+ 82 Linux swap / Solaris
//分区表写入磁盘并退出
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
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格式化交换分区
[pre]
mkswap /dev/sdb6
Setting up swapspace version 1, size = 4194204 KiB
no label, UUID=40eff2c0-3f6b-440e-bc2a-f71d3d5581a7
[/pre]
启用交换分区
[pre]
swapon /dev/sdb6
[/pre]
查看交换分区加载状态
[pre]
free
1
total used free shared buffers cached
Mem: 1030108 160768 869340 264 12040 56188
-/+ buffers/cache: 92540 937568
Swap: 6291352 0 6291352
[/pre]
停用交换分区
[pre]
swapoff /dev/sdb6
[/pre]
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发表于 2018-8-13 17:50:10
