Ubuntu 18.04.6 LTSわよ
$ sudo apt update && apt list --upgradable
:
intel-microcode/bionic-updates 3.20220510.0ubuntu0.18.04.1 amd64 [upgradable from: 3.20210608.0ubuntu0.18.04.1]
linux-generic/bionic-updates,bionic-security 4.15.0.187.173 amd64 [upgradable from: 4.15.0.184.172]
linux-headers-generic/bionic-updates,bionic-security 4.15.0.187.173 amd64 [upgradable from: 4.15.0.184.172]
linux-image-generic/bionic-updates,bionic-security 4.15.0.187.173 amd64 [upgradable from: 4.15.0.184.172]
linux-libc-dev/bionic-updates,bionic-security 4.15.0-187.198 amd64 [upgradable from: 4.15.0-184.194]
linux-signed-generic/bionic-updates,bionic-security 4.15.0.187.173 amd64 [upgradable from: 4.15.0.184.172]
マイクロコード?
$ sudo apt dist-upgrade -y
$ cat /var/run/reboot-required*
*** System restart required ***
linux-base
ほいほい
$ sync; sync; sync; sudo reboot
(-人-)
13:17:07 up 0 min, 0 users, load average: 4.37, 1.09, 0.37
ヨシ