[Bug 2016950] Re: ubuntu 23.o4 新安装ssh默认端口修改不成功

[Shengjing Zhu]

Since ubuntu 22.10, openssh-server uses socket activation. You can read
more at /usr/share/doc/openssh-server/README.Debian.gz

Copying here:

Socket-based activation with systemd
------------------------------------

By default, socket-based activation is used on systems that use systemd.

The provided ssh.socket unit file sets ListenStream=22.  If you need to have
it listen on a different address or port, then you will need to do this as
follows (modifying ListenStream to match your requirements):

  mkdir -p /etc/systemd/system/ssh.socket.d
  cat >/etc/systemd/system/ssh.socket.d/listen.conf <<EOF
  [Socket]
  ListenStream=2222
  EOF
  systemctl daemon-reload

See systemd.socket(5) for details.

If you do not want to use socket activation for ssh on your system, you
can disable socket activation by running:

  systemctl disable --now ssh.socket
  systemctl enable --now ssh.service


** Package changed: ubuntu-release-upgrader (Ubuntu) => openssh (Ubuntu)

** Changed in: openssh (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/2016950

Title:
  ubuntu 23.o4 新安装ssh默认端口修改不成功

Status in openssh package in Ubuntu:
  Invalid

Bug description:
  ubuntu 23.04新安装的系统，安装openssh-server 后，修改默认22端口不成功。

  ProblemType: Bug
  DistroRelease: Ubuntu 23.04
  Package: ubuntu-release-upgrader-core 1:23.04.5
  ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6
  Uname: Linux 6.2.0-20-generic x86_64
  ApportVersion: 2.26.1-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Apr 19 13:01:31 2023
  InstallationDate: Installed on 2022-01-02 (471 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211105)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to lunar on 2022-11-12 (158 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting
  mtime.conffile..etc.update-manager.release-upgrades: 2022-11-13T20:00:56.608141

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