如何删除/dev/循环
如何删除/dev/循环
提问于 2019-12-11 10:52:29
在我的Ubuntu桌面上，命令fdisk -l将/dev/环X显示到/dev/loop23。我在Ubuntu18.04LTS上使用gnome备份。
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，我如何才能删除它们呢？
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 bytesdf的输出：
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回答 2
Ask Ubuntu用户
回答已采纳
发布于 2019-12-11 22:30:32
您安装的所有循环设备似乎都是截图。如果(正如您已经指出)，您真的不希望其中的任何一个引用man snap。
以下是相关的节选：
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还有一个例子：snap remove --purge gphoto2
正如手册页中提到的，--purge开关删除快照而不保存其数据的快照。正如在这句话中提到的，您可能希望找到这些snap应用的非即插即用的替代方案。
Ubuntu包搜索页面可能在帮助您搜索具有相应功能的deb包方面很有用。
注意:正如在这个答案中提到的，尽管您可以卸载目录并删除核心快照，但是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。
另外，重要的是要明白，snap软件包的优点和弱点是相同的，围绕这些软件包的批评大多与赞扬相同。自动更新快照是两种厌恶和喜爱取决于你问谁。只读循环安装的快照对一些人来说是一种恩惠，对另一些人来说是一种烦恼。你可以在https://en.wikipedia.org/wiki/Snappy_(包装)_经理)上找到更多关于这一点的信息。
维基百科文章中提到的许多文章也值得一读。
Ask Ubuntu用户
发布于 2019-12-11 11:36:12
编辑sudo fdisk -l
今天的问题已经改变了，所以这里是如何删除额外的输出，而不需要删除所有的快照和没有计算器什么的：
sudo fdisk -l | sed -e '/Disk \/dev\/loop/,+5d'由于很难记住这一点，您可以在~/.bashrc中创建一个别名：
alias fdsk="sudo fdisk -l | sed -e '/Disk \/dev\/loop/,+5d'"然后，只需在命令行中键入fdsk，并在提示时输入密码。
正如注释中提到的，/dev/loop99是在这里描述的简单文件系统映像：
假设您不想卸载所有快照，那么您的下一个最佳选择是通过附加| grep -v ^/dev/loop来隐藏它们，使其不受输出的影响。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页面原文内容由Ask Ubuntu提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://askubuntu.com/questions/1195388
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