Ubuntu 20.04.5 LTSわよ
$ sudo apt update && apt list --upgradable
:
libgnutls-openssl27/focal-updates,focal-security 3.6.13-2ubuntu1.8 amd64 [upgradable from: 3.6.13-2ubuntu1.7]
libgnutls30/focal-updates,focal-security 3.6.13-2ubuntu1.8 amd64 [upgradable from: 3.6.13-2ubuntu1.7]
python3-software-properties/focal-updates,focal-updates 0.99.9.11 all [upgradable from: 0.99.9.10]
software-properties-common/focal-updates,focal-updates 0.99.9.11 all [upgradable from: 0.99.9.10]
tar/focal-updates,focal-security 1.30+dfsg-7ubuntu0.20.04.3 amd64 [upgradable from: 1.30+dfsg-7ubuntu0.20.04.2]
$ sudo apt dist-upgrade -y
$ cat /var/run/reboot-required*
cat: '/var/run/reboot-required*': No such file or directory
ﾖｼ (libgnutlsは再起動を要求しないのね