ところでUbuntu 14.04.6 LTS+ESM
UA Infrastructure Extended Security Maintenance (ESM) is enabled.
1 update can be installed immediately.
1 of these updates is provided through UA Infrastructure ESM.
1 of these updates is a security update.
$ apt list --upgradable
Listing... Done
libexpat1/trusty-infra-security 2.1.0-4ubuntu1.4+esm4 i386 [upgradable from: 2.1.0-4ubuntu1.4+esm2]
$ sudo sh -c 'apt-get update && apt-get upgrade -y'
:
$ cat /var/run/reboot-required*
cat: /var/run/reboot-required*: No such file or directory