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docs(headless-server): correct the t64 substitution failure mode

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The mixed-list warning named the wrong mechanism. Old names mostly still
resolve on 24.04, because each renamed package declares Provides: its
unsuffixed name. The exception is libasound2, which liboss4-salsa-asound2
in universe also claims — apt refuses to choose between two providers and
aborts the whole install line rather than silently installing a shim.

Also pins libfuse2t64 as definite rather than possible, and widens the
libfuse2 line to cover 20.04, which is in the support matrix.
This commit is contained in:
Neil
2026-08-28 02:12:33 -07:00
parent 1ff1a18154
commit 3d4f9bb915
1 changed files with 12 additions and 6 deletions
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docs/reference/headless-linux-server.md
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@@ -43,13 +43,19 @@ substitute the unsuffixed names:
- `libcups2t64` becomes `libcups2`
- `libatspi2.0-0t64` becomes `libatspi2.0-0`
The other names are identical on every supported release. The two sets are not
interchangeable: `apt-get install` fails outright on a name the release does not
carry, and on Ubuntu 24.04 `libasound2` survives only as a virtual package for an
unrelated library, so it installs without giving Electron what it needs.
The other names are identical on every supported release. The substitution is not
symmetric, so use the list that matches the release. A `t64` name on Ubuntu 20.04,
Ubuntu 22.04, or Debian 12 fails immediately with `E: Unable to locate package
libgtk-3-0t64`. In the other direction the old names mostly still resolve, because
each renamed package declares `Provides:` its unsuffixed name — except `libasound2`
on Ubuntu 24.04, where `liboss4-salsa-asound2` in `universe` claims that name too.
apt will not choose between two providers and exits with `E: Package 'libasound2'
has no installation candidate`, which aborts the entire install line and leaves none
of the libraries installed.
On Ubuntu 22.04, install `libfuse2` to execute the AppImage through FUSE. On
Ubuntu 24.04 and Debian, the equivalent package may be `libfuse2t64`. FUSE is
On Ubuntu 20.04 and 22.04, install `libfuse2` to execute the AppImage through
FUSE. On Ubuntu 24.04 and Debian 13 the package is `libfuse2t64`, though the plain
`libfuse2` name also resolves there because nothing else provides it. FUSE is
optional: without it, use the AppImage's supported extraction path:
```bash