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Accepted
DK Bose
Asked: 2020-05-07 05:22:08 +0800 CST

如何识别系统上不再需要的快照？

  • 772

操作系统：Ubuntu 20.04

以下是snap list新安装 Ubuntu 20.04 的输出：

$ snap list
Name                             Version             Rev   Tracking         Publisher   Notes
core18                           20200311            1705  latest/stable    canonical✓  base
gnome-3-34-1804                  0+git.2c86692       27    latest/stable/…  canonical✓  -
gtk-common-themes                0.1-36-gc75f853     1506  latest/stable/…  canonical✓  -
snap-store                       3.36.0-74-ga164ec9  433   latest/stable/…  canonical✓  -
snapd                            2.44.3              7264  latest/stable    canonical✓  snapd
$

这是我在安装各种快照（并删除一些）后看到的：

$ snap list
Name                             Version                     Rev   Tracking         Publisher   Notes
core                             16-2.44.3                   9066  latest/stable    canonical✔  core
core18 •                         20200427                    1754  latest/stable    canonical✔  base
firefox *                        77.0b2-1                    358   latest/beta      mozilla✔    -
gnome-3-28-1804                  3.28.0-16-g27c9498.27c9498  116   latest/stable    canonical✔  -
gnome-3-34-1804 •                0+git.2c86692               27    latest/stable/…  canonical✔  -
gnome-system-monitor *           3.32.0-27-g32ed970e06       135   latest/stable    canonical✔  -
gtk-common-themes •              0.1-36-gc75f853             1506  latest/stable/…  canonical✔  -
kanagram *                       20.04.0                     51    latest/stable    kde✔        -
kcolorchooser *                  20.04.0                     57    latest/stable    kde✔        -
kde-frameworks-5                 5.47.0                      27    latest/stable    kde✔        -
kde-frameworks-5-core18          5.61.0                      32    latest/stable    kde✔        -
kde-frameworks-5-qt-5-14-core18  5.68.0                      4     latest/stable    kde✔        -
kolourpaint *                    20.04.0                     56    latest/stable    kde✔        -
ksnip *                          1.7.0                       46    latest/edge      dporobic    -
okular *                         20.04.0                     98    latest/stable    kde✔        -
snap-store •                     3.36.0-74-ga164ec9          433   latest/stable/…  canonical✔  -
snapd •                          2.44.3                      7264  latest/stable    canonical✔  snapd
$

为了便于讨论，我们打电话

  • 五个原始快照（•在其名称旁边标记）“系统快照”
  • 我故意安装的快照（*在他们的名字旁边标记）“主要快照”
  • 和其他按扣“支持按扣”
    • 核
    • 侏儒 3-28-1804
    • kde-frameworks-5
    • kde-frameworks-5-core18
    • kde-frameworks-5-qt-5-14-core18

ls -lh /var/lib/snapd/snaps鉴于系统存储了一个快照和至少两个修订版，并且一些支持快照可能是几百 MB（.

但是如何将支持快照“映射”到主要快照？

就我而言，我可以运行snap connections okular到kde-frameworks-5-qt-5-14-core18由于sudo snap install okular.

但snap connections …仅在仍安装了相关快照时才有效。我已经安装但后来删除了falkon, featherpad, kcalc, konversation,palapeli和ksnip.

是否有与安装和删除类似于/var/log/dpkg.log或的快照相关的日志文件/var/log/apt/history.log？

如果没有，还有什么办法知道是否仍然需要“支持”快照？

一个相关但未回答的问题在这里：如何列出手动安装的快照并删除不再需要的自动安装的快照？

snap

1 个回答

  1. Best Answer

    检查snap.yaml所有已安装快照的文件可能有助于我们了解需要哪些“支持”快照。可以删除未列出的“支持”快照。

    例子：

    ~$ grep "default-provider:" /snap/*/*/meta/snap.yaml
/snap/snap-store/415/meta/snap.yaml：默认提供者：gnome-3-28-1804
/snap/snap-store/415/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/snap-store/415/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/snap-store/415/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/snap-store/current/meta/snap.yaml：默认提供者：gnome-3-28-1804
/snap/snap-store/current/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/snap-store/current/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/snap-store/current/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/132/meta/snap.yaml：默认提供者：gnome-3-28-1804
/snap/wire/132/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/132/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/132/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/current/meta/snap.yaml：默认提供者：gnome-3-28-1804
/snap/wire/current/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/current/meta/snap.yaml：默认提供者：gtk-common-themes
/snap/wire/current/meta/snap.yaml：默认提供者：gtk-common-themes
    ~$ grep "base:" /snap/*/*/meta/snap.yaml
/snap/gnome-3-28-1804/116/meta/snap.yaml:base: core18
/snap/gnome-3-28-1804/current/meta/snap.yaml:base: core18
/snap/gtk-common-themes/1506/meta/snap.yaml:base: core18
/snap/gtk-common-themes/current/meta/snap.yaml:base: core18
/snap/snap-store/415/meta/snap.yaml:base: core18
/snap/snap-store/current/meta/snap.yaml:base: core18
/snap/wire/132/meta/snap.yaml:base: core18
/snap/wire/current/meta/snap.yaml:base: core18
    • 7

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