Linux學習筆記（五） 新增swap分割槽

fdisk /dev/sdb

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+ 83 linux

//t命令：改寫分割槽十六進製制編碼

command (m for help): t 
partition number (1-6): 6
//l命令可以檢視不同分割槽的十六進製制編碼，交換分割槽為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
//分割槽表寫入磁碟並退出
command (m for help): w
the partition table has been altered!
calling ioctl() to re-read partition table.
syncing disks.

mkswap /dev/sdb6

setting up swapspace version 1, size = 4194204 kib

no label, uuid=40eff2c0-3f6b-440e-bc2a-f71d3d5581a7

swapon /dev/sdb6

free

total       used       free     shared    buffers     cached

mem: 1030108 160768 869340 264 12040 56188
-/+ buffers/cache: 92540 937568
swap: 6291352 0 6291352

swapoff /dev/sdb6

直接修改/etc/fstab配置檔案，使系統啟動時自動掛載：

/dev/sdb6               swap                    swap    defaults        0 0

//檢視交換分割槽

swapon -s
filename type size used priority
/dev/sda2 partition 2097148 0 -1
/dev/sdb6 partition 4194204 0 -2

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