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Karlom
Asked: 2019-12-12 02:52:29 +0800 CST

如何删除 /dev/loops [重复]

  • 772

在我的 Ubuntu 桌面上，该命令fdisk -l显示 /dev/loopX up to /dev/loop23. 我在 Ubuntu 18.04 LTS 上使用 gnome-fallback。

我想知道这些可能对操作系统的性能和稳定性产生什么影响，如果它们只是多余的，我该如何删除它们？

root@pc5:~# fdisk -l
...
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop15: 3.7 MiB, 3821568 bytes, 7464 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 /dev/loop16: 54.6 MiB, 57274368 bytes, 111864 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 /dev/loop17: 140.7 MiB, 147501056 bytes, 288088 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 /dev/loop18: 14.8 MiB, 15462400 bytes, 30200 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 /dev/loop19: 42.8 MiB, 44879872 bytes, 87656 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 /dev/loop20: 54.5 MiB, 57151488 bytes, 111624 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 /dev/loop21: 4.2 MiB, 4403200 bytes, 8600 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 /dev/loop22: 153.5 MiB, 160935936 bytes, 314328 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 /dev/loop23: 140.7 MiB, 147501056 bytes, 288088 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

输出df：

Filesystem      1K-blocks       Used  Available Use% Mounted on
udev              8128184          0    8128184   0% /dev
tmpfs             1630464       3716    1626748   1% /run
/dev/sda2       229184876   63255488  154217748  30% /
tmpfs             8152300     142672    8009628   2% /dev/shm
tmpfs                5120          4       5116   1% /run/lock
tmpfs             8152300          0    8152300   0% /sys/fs/cgroup
/dev/loop2         160512     160512          0 100% /snap/gnome-3-28-1804/110
/dev/loop3           4352       4352          0 100% /snap/gnome-calculator/544
/dev/loop0           3840       3840          0 100% /snap/gnome-system-monitor/111
/dev/loop4          91264      91264          0 100% /snap/core/8039
/dev/loop1           1024       1024          0 100% /snap/gnome-logs/81
/dev/loop6          87936      87936          0 100% /snap/shotcut/55
/dev/loop5         406528     406528          0 100% /snap/redis-desktop-manager/332
/dev/loop8          91264      91264          0 100% /snap/core/8213
/dev/loop7         406656     406656          0 100% /snap/redis-desktop-manager/335
/dev/loop9          15104      15104          0 100% /snap/gnome-characters/367
/dev/loop11        157184     157184          0 100% /snap/chromium/949
/dev/loop12         87808      87808          0 100% /snap/shotcut/53
/dev/loop13          1024       1024          0 100% /snap/gnome-logs/73
/dev/loop14         45312      45312          0 100% /snap/gtk-common-themes/1353
/dev/loop16         55936      55936          0 100% /snap/core18/1279
/dev/loop15          3840       3840          0 100% /snap/gnome-system-monitor/107
/dev/loop10        159872     159872          0 100% /snap/gnome-3-28-1804/91
/dev/loop17        144128     144128          0 100% /snap/gnome-3-26-1604/97
/dev/sda1          523248       6232     517016   2% /boot/efi
/dev/loop18         15104      15104          0 100% /snap/gnome-characters/359
/dev/loop19         43904      43904          0 100% /snap/gtk-common-themes/1313
/dev/loop20         55936      55936          0 100% /snap/core18/1265
/dev/loop21          4352       4352          0 100% /snap/gnome-calculator/536
/dev/loop22        157184     157184          0 100% /snap/chromium/958
/dev/loop23        144128     144128          0 100% /snap/gnome-3-26-1604/98
/dev/sdb1       492127240  409174612   57930932  88% /home
tmpfs             1630460         16    1630444   1% /run/user/121
tmpfs             1630460        140    1630320   1% /run/user/1001
tmpfs             1630460          0    1630460   0% /run/user/0
disk-management fdisk loop-device

2 个回答

  1. 编辑sudo fdisk -l

    今天的问题发生了变化，所以这里是如何删除额外的输出而不需要删除所有快照并且没有计算器等等：

    sudo fdisk -l | sed -e '/Disk \/dev\/loop/,+5d'

    由于这可能很难记住，您可以在您的~/.bashrc:

    alias fdsk="sudo fdisk -l | sed -e '/Disk \/dev\/loop/,+5d'"

    然后只需fdsk在命令行中键入并在出现提示时输入您的密码。

    正如评论/dev/loop99中提到的，这里描述的快照文件系统图像：

    假设您不想卸载所有快照，则下一个最佳选择是通过附加| grep -v ^/dev/loop. 例如：

    $ df | grep -v ^/dev/loop

Filesystem      1K-blocks      Used Available Use% Mounted on
udev              3978476         0   3978476   0% /dev
tmpfs              802400      1688    800712   1% /run
/dev/nvme0n1p6   46445360  33133368  11159560  75% /
tmpfs             4011984    227448   3784536   6% /dev/shm
tmpfs                5120         4      5116   1% /run/lock
tmpfs             4011984         0   4011984   0% /sys/fs/cgroup
/dev/nvme0n1p8    9485308   1890272   7595036  20% /mnt/e
/dev/nvme0n1p10  27937812  22501880   3993732  85% /mnt/clone
/dev/nvme0n1p7   23734708  19316220   3189796  86% /mnt/old
/dev/nvme0n1p4  380829660 169799196 211030464  45% /mnt/c
/dev/nvme0n1p2      97280     33222     64058  35% /boot/efi
/dev/sda3       963668988  43929712 919739276   5% /mnt/d
tmpfs              802400        60    802340   1% /run/user/1000
    • 12
  2. Best Answer

    您所有的循环安装设备似乎都是snap。如果（如您所指出的）您真的不希望其中任何一个引用man snap.

    以下是相关摘录：

     remove
       Remove snaps from the system

       The remove command removes the named snap instance from the system.

       By default all the snap revisions are removed, including their data and the common data direc‐
       tory. When a --revision option is passed only the specified revision is removed.

       Usage: snap remove [remove-OPTIONS]

       --no-wait
              Do not wait for the operation to finish but just print the change id.

       --revision
              Remove only the given revision

       --purge
              Remove the snap without saving a snapshot of its data

    和一个例子： snap remove --purge gphoto2

    如手册页所述，--purge开关删除快照而不保存其数据的快照。如本评论中所述，您可能希望找到这些快照应用程序的非快照替代品。

    Ubuntu 包搜索页面可能有助于您搜索具有相应功能的 deb 包。

    注意：正如这个答案中提到的，虽然您可以卸载目录并删除核心快照，但这样做会破坏所有已安装的快照，因此系统将使您很难做到这一点。

    作为旁注，重要的是要了解 snap 包的优点和缺点是相同的，并且围绕这些包的许多批评与赞誉相同。根据您的要求，快照的自动更新既讨厌又喜欢。只读循环安装的按扣对某些人来说是一种恩惠，而对另一些人来说则是一种烦恼。您可以在https://en.wikipedia.org/wiki/Snappy_(package_manager)找到更多相关信息

    维基百科文章中引用的许多文章也值得一读。

    • 2

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