Ubuntu Server 20.04.3 LTSわよ
$ sudo sh -c 'apt update && apt dist-upgrade -y'
:
The following packages will be upgraded:
ubuntu-advantage-tools
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
:
Unpacking ubuntu-advantage-tools (27.5~18.04.1) over (27.4.2~18.04.1) ...
:
$ cat /var/run/reboot-required*
cat: '/var/run/reboot-required*': No such file or directory