そうそうUbuntu 18.04.5 LTS
$ sudo apt update; sudo apt dist-upgrade -y
：
The following NEW packages will be installed:
linux-headers-4.15.0-141 linux-headers-4.15.0-141-generic
linux-image-4.15.0-141-generic linux-modules-4.15.0-141-generic
linux-modules-extra-4.15.0-141-generic python3-pexpect python3-ptyprocess
The following packages will be upgraded:
libhogweed4 libnettle6 linux-generic linux-headers-generic
linux-image-generic linux-libc-dev linux-signed-generic sosreport
8 upgraded, 7 newly installed, 0 to remove and 0 not upgraded.
:
$ cat /var/run/reboot-required*
*** System restart required ***
linux-base
$ sync; sync; sync; sudo reboot
(-人-)