Ubuntu 18.04.6 LTSです
$ sudo apt update && apt list --upgradable
apache2/bionic-updates,bionic-security 2.4.29-1ubuntu4.24 amd64
apache2-bin/bionic-updates,bionic-security 2.4.29-1ubuntu4.24 amd64
apache2-data/bionic-updates,bionic-updates,bionic-security,bionic-security 2.4.29-1ubuntu4.24 all
apache2-utils/bionic-updates,bionic-security 2.4.29-1ubuntu4.24 amd64
libssl1.0.0/bionic-updates,bionic-security 1.0.2n-1ubuntu5.10 amd64
libssl1.1/bionic-updates,bionic-security 1.1.1-1ubuntu2.1~18.04.19 amd64
openssl/bionic-updates,bionic-security 1.1.1-1ubuntu2.1~18.04.19 amd64
apache2つこてるんよー
$ sudo apt dist-upgrade -y
$ cat /var/run/reboot-required*
*** System restart required ***
libssl1.0.0
libssl1.1
ういうい
$ sync; sync; sync; sudo reboot
(-人-)