Ubuntu 18.04.6 LTSでし

1 update can be applied immediately.

$ sudo sh -c 'apt update && apt dist-upgrade -y'
:
The following packages will be upgraded:
libssl1.1 openssl ubuntu-advantage-tools
3 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
:
$ cat /var/run/reboot-required*
*** System restart required ***
libssl1.1
$ sync; sync; sync; sudo reboot

(-人-) #おっさんsync