我创建了一个 5 GB 的交换分区，但我总是注意到它在系统监视器上被标记为“不可用”，而且当我执行操作时会消耗整个 RAM，ubuntu 会开始终止以释放 RAM，而 SWAP 根本没有用处
我在终端输入了sudo mountall -v
以下内容
mounted event handled for /proc/sys/fs/binfmt_misc local 1/5 remote 0/0 virtual 1/12 swap 0/1 mounted event handled for /sys local 1/5 remote 0/0 virtual 2/12 swap 0/1 mounted event handled for /sys/fs/fuse/connections local 1/5 remote 0/0 virtual 3/12 swap 0/1 mounted event handled for /sys/kernel/security local 1/5 remote 0/0 virtual 4/12 swap 0/1 mounted event handled for /dev/pts local 1/5 remote 0/0 virtual 5/12 swap 0/1 mounted event handled for /run/lock local 1/5 remote 0/0 virtual 6/12 swap 0/1 mounted event handled for /run/shm local 1/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /home/ahmed/.gvfs local 2/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /media/UbuntuGeneralFiles local 3/5 remote 0/0 virtual 7/12 swap 0/1 mounted event handled for /media/ONCE\040AND\040FOR\040ALL local 4/5 remote 0/0 virtual 7/12 swap 0/1 mounting event handled for /tmp mounted event handled for /dev local 4/5 remote 0/0 virtual 8/12 swap 0/1 mounted event handled for /proc local 4/5 remote 0/0 virtual 9/12 swap 0/1 mounted event handled for /sys/kernel/debug local 4/5 remote 0/0 virtual 10/12 swap 0/1 mounted event handled for /run local 4/5 remote 0/0 virtual 11/12 swap 0/1 mounted event handled for /home/ahmed virtual finished remote finished local 4/5 remote 0/0 virtual 12/12 swap 0/1 mounted event handled for /tmp local finished All filesystems mounted local 5/5 remote 0/0 virtual 12/12 swap 0/1
这是 fstab 输出
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sdf1 during installation
UUID=34c3c29b-e5dd-4ed7-a49b-616afded4704 / ext4 errors=remount-ro 0 1
# swap was on /dev/sdf2 during installation
#UUID=9a7f0b9c-9be9-4074-8957-afcf25072bbe none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
/dev/disk/by-label/swap /mnt/swap auto nosuid,nodev,nofail 0 0
/dev/sdb2 /mnt/sdb2 ext4 nosuid,nodev,nofail 0 0
sudo blkid
这是`的输出
/dev/sda1: UUID="AC9C59EA9C59B016" TYPE="ntfs"
/dev/sda2: LABEL="System" UUID="C26CFB2E6CFB1C3B" TYPE="ntfs"
/dev/sda3: LABEL="ONCE AND FOR ALL" UUID="3EF60BD0F60B86FD" TYPE="ntfs"
/dev/sdb1: UUID="34c3c29b-e5dd-4ed7-a49b-616afded4704" TYPE="ext4"
/dev/sdb2: LABEL="Swap" UUID="21cf04d1-6c18-4ab7-a8c3-ec435ab3f43e" TYPE="ext4"
/dev/sdb5: LABEL="UbuntuGeneralFiles" UUID="E636244736241AD7" TYPE="ntfs"
/dev/sr1: LABEL="Etisalat 3.5G" TYPE="iso9660"
`sudo fdisk -l：
Disk /dev/sda: 1000.2 GB, 1000203804160 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953523055 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: 0x0d91aeaa
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT
/dev/sda2 206848 209717247 104755200 7 HPFS/NTFS/exFAT
/dev/sda3 209717248 1953519615 871901184 7 HPFS/NTFS/exFAT
Disk /dev/sdb: 250.1 GB, 250059350016 bytes
64 heads, 32 sectors/track, 238475 cylinders, total 488397168 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: 0x00000001
Device Boot Start End Blocks Id System
/dev/sdb1 2048 236331007 118164480 83 Linux
/dev/sdb2 236333056 244148221 3907583 82 Linux swap / Solaris
/dev/sdb3 244148222 488396799 122124289 5 Extended
/dev/sdb5 244148224 488396799 122124288 7 HPFS/NTFS/exFAT`
我不知道实际上发生了什么，有什么帮助吗？
答案1
13.10
如果其他人在 13.10 上遇到类似的问题，我在 ArchWiki 上找到了这些说明。
检查交换状态：
swapon -s
或者
free -m
如果没有列出任何内容（您没有交换），您可以在正在运行的系统上创建它，如下所示：
首先，列出可用的分区使用：
sudo blkid
mkswap 实用程序默认为分区生成一个 UUID，因此最好使用 -U 标志来指定交换 UUID（如果已存在）。将“custom_UUID”替换为前面列出的相应 UUID。此外，将 /dev/sda5 替换为要用于交换的分区：
警告：指定分区上的所有数据将丢失。
sudo mkswap -U custom_UUID /dev/sda5
如果未列出交换分区，则blkid可以使用以下命令分配随机 UUID：
sudo mkswap /dev/sda5
要在此设备上启用交换：
sudo swapon /dev/sda5
现在，检查 /etc/fstab 以确保系统将在启动时挂载该分区。我将使用 gedit，但任何文本编辑器都可以。
sudo gedit /etc/fstab
如果没有列出交换，您可能需要使用 /dev/sda5 或 UUID 将其添加到列表末尾。
/dev/sda5 none swap defaults 0 0
重启
我希望这有帮助。
答案2
使用 gparted GUI 的解决方案：
打开 gparted，然后左键单击交换分区并在上下文菜单中选择 swapon。
答案3
看起来交换分区存在，但请检查它cat /proc/swaps，然后尝试激活它sudo swapon --all