Ubuntu 18.04.6 LTSわよ

$ sudo apt update && apt list --upgradable
:
openssh-client/bionic-updates 1:7.6p1-4ubuntu0.7 amd64 [upgradable from: 1:7.6p1-4ubuntu0.6]
openssh-server/bionic-updates 1:7.6p1-4ubuntu0.7 amd64 [upgradable from: 1:7.6p1-4ubuntu0.6]
openssh-sftp-server/bionic-updates 1:7.6p1-4ubuntu0.7 amd64 [upgradable from: 1:7.6p1-4ubuntu0.6]
$ sudo apt dist-upgrade -y
$ cat /var/run/reboot-required*
cat: '/var/run/reboot-required*': No such file or directory

sshdはリスタートすればいいんだけどlibsslは誰が開けてるかわからないんだろうねえ