是否以及如何刪除 btrfs qgroup

我有一個 btrfs 文件系統，並且正在執行 OpenSuse 15。它已多次升級到新的 OpenSuse。第一次安裝可能不在 btrfs 上。我的根分區有點擁擠，我無法確定它是否安全，以及如何刪除我認為可能是“不需要”的 snapper 快照。

> df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda6        41G   35G  5.1G  88% /

這裡有什麼東西看起來像一個很好的刪除候選者嗎？也許是 17G qgroup？

> btrfs qgroup show /
qgroupid         rfer         excl 
--------         ----         ---- 
0/5          16.00KiB     16.00KiB 
0/257        16.00KiB     16.00KiB 
0/258        14.67MiB     14.67MiB 
....
0/710        11.28GiB    372.00KiB 
1/0          28.32GiB     17.04GiB 
255/269      16.00KiB     16.00KiB 

Snapper 列出了以下快照：

> snapper list
Type   | #   | Pre # | Date                     | User | Cleanup | Description           | Userdata     
-------+-----+-------+--------------------------+------+---------+-----------------------+--------------
single | 0   |       |                          | root |         | current               |              
single | 1   |       | Sat Mar 10 04:01:52 2018 | root |         | first root filesystem |              
pre    | 177 |       | Mon Mar 11 00:37:41 2019 | root | number  | zypp(zypper)          | important=yes
post   | 178 | 177   | Mon Mar 11 00:52:40 2019 | root | number  |                       | important=yes
...
pre    | 283 |       | Sat Sep 21 02:35:12 2019 | root | number  | zypp(zypper)          | important=no 
post   | 284 | 283   | Sat Sep 21 02:36:04 2019 | root | number  |                       | important=no 
pre    | 285 |       | Sun Sep 22 12:51:57 2019 | root | number  | yast snapper          |              
post   | 286 | 285   | Sun Sep 22 12:53:04 2019 | root | number  |                       |              

給我更多的gobbledygook：

> btrfs subvol show /

@/.snapshots/1/snapshot
       Name:                   snapshot
       UUID:                   4eed144d-9dee-6447-8cd5-75c756bf2367
       Parent UUID:            df2738e0-3b0e-3d42-9cd0-da8252d015be
       Received UUID:          -
       Creation time:          2018-03-10 04:01:52 -0800
       Subvolume ID:           259
       Generation:             936168
       Gen at creation:        11
       Parent ID:              258
       Top level ID:           258
       Flags:                  -
       Snapshot(s):
                               @/.snapshots/177/snapshot
                               @/.snapshots/178/snapshot
                               @/.snapshots/179/snapshot
                               @/.snapshots/180/snapshot
                               @/.snapshots/220/snapshot
                               @/.snapshots/221/snapshot
                               @/.snapshots/234/snapshot
                               @/.snapshots/235/snapshot
                               @/.snapshots/267/snapshot
                               @/.snapshots/268/snapshot
                               @/.snapshots/281/snapshot
                               @/.snapshots/282/snapshot
                               @/.snapshots/283/snapshot
                               @/.snapshots/284/snapshot
                               @/.snapshots/285/snapshot
                               @/.snapshots/286/snapshot
                               @/.snapshots/287/snapshot
                               @/.snapshots/288/snapshot
                               @/.snapshots/289/snapshot
                               @/.snapshots/290/snapshot

請讓我知道還有什麼其他資訊可以提供幫助。

由於您使用的是 snapper，因此最好使用它的工具來管理這些快照。rm無論如何都無法刪除 BTRFS 快照；）

要刪除所有快照（“目前”除外），請執行：sudo snapper delete 1-290

引用自：https://unix.stackexchange.com/questions/543146