When Linux prompts to reboot a server – „for reasons“, of course – some background information might be welcome.

Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 4.15.0-126-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
...
0 packages can be updated.
0 updates are security updates.

*** System restart required ***

Last login: Tue Dec  8 15:50:09 2020 from 192.168.1.413

First try: 😉

user@ubuntu:~$ cat /var/run/reboot-required
*** System restart required ***

Better:

user@ubuntu:~$ cat /var/run/reboot-required.pkgs
libssl1.0.0
linux-base

Let’s go.

Disclaimer:
As part of my personal „move away from evernote“ initiative this has been documented here, maybe it’s interesting for somebody.

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