如何删除 /dev/loops

如何删除 /dev/loops

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

我想知道这些可能会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

答案1

编辑sudo fdisk -l

今天问题已经改了,所以这里介绍一下如何删除多余的输出,而不需要删除所有的快照,也不需要留下计算器等等:

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

由于这可能很难记住,您可以在中创建一个别名~/.bashrc

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

然后只需fdsk在命令行中输入并在提示时输入您的密码。


正如评论中所提到的,/dev/loop99这里描述了快照文件系统图像:

假设你不想卸载所有 snap 包,那么下一个最佳选择就是通过附加 来隐藏它们| 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

答案2

所有环路安装的设备似乎快照。如果(正如您所指出的)您确实不想让其中任何一个提及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

举个例子: snap remove --purge gphoto2

正如手册页中提到的--purge开关会删除快照而不保存其数据的快照。如此评论您可能希望找到这些 snap 应用程序的非 snap 替代品。

Ubuntu 软件包搜索页面可能有助于您搜索具有相应功能的 deb 包。

注意力:正如所提到的这个答案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,因此系统会使您很难做到这一点。

顺便说一句,重要的是要明白 snap 软件包的优点和缺点是一样的,而且围绕这些软件包的批评和赞誉也是一样的。根据你问的人的不同,snap 自动更新既有人讨厌,也有人喜欢。只读循环安装的 snap 对某些人来说是一种福音,对另一些人来说却是一种烦恼。你可以在以下网址了解更多信息:https://en.wikipedia.org/wiki/Snappy_(package_manager)

维基百科文章中引用的许多文章也值得一读。

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