Ubuntu 18.04.6 LTSわよ
$ sudo apt update && apt list --upgradable
:
git/bionic-updates,bionic-security 1:2.17.1-1ubuntu0.12 amd64 [upgradable from: 1:2.17.1-1ubuntu0.11]
git-man/bionic-updates,bionic-updates,bionic-security,bionic-security 1:2.17.1-1ubuntu0.12 all [upgradable from: 1:2.17.1-1ubuntu0.11]
$ sudo apt dist-upgrade -y
$ cat /var/run/reboot-required*
cat: '/var/run/reboot-required*': No such file or directory
ヨシ