After it has been a production System, maybe it’s difficult to update System, however, at least after installing, Update Ubuntu Server to the latest.

Update your Ubuntu Server

# update List first
root@localhost:~# apt update
Hit:1 http://jp.archive.ubuntu.com/ubuntu jammy InRelease
Hit:2 http://jp.archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:3 http://jp.archive.ubuntu.com/ubuntu jammy-backports InRelease
Hit:4 http://jp.archive.ubuntu.com/ubuntu jammy-security InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.

# update System
root@localhost:~# apt -y upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  linux-generic linux-headers-generic linux-image-generic
The following packages will be upgraded:
  git git-man
2 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
2 standard security updates
Need to get 4082 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://jp.archive.ubuntu.com/ubuntu jammy-updates/main amd64 git-man all 1:2.34.1-1ubuntu1.1 [952 kB]
Get:2 http://jp.archive.ubuntu.com/ubuntu jammy-updates/main amd64 git amd64 1:2.34.1-1ubuntu1.1 [3131 kB]
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