This message indicates the presence of the file
/var/run/reboot-required. Ubuntu packages can trigger the creation of this file in their post-installation script
A restart is usually required when an update to the Linux kernel has been installed. These are often security patches that only come into effect after reboot.
/var/run/reboot-required.pkgs lists the packages that requested the reboot. To view this file:
You should see a list of packages awaiting reboot:
Above we can see there is a Linux kernel security update
linux-base, which requires a system restart.
To reboot, run:
You typically don’t need to restart right away, but you’ll be vulnerable to any security problems fixed in the new kernel until you do.
Another way to to find out what packages have been recently installed is to run:
zgrep -h 'status installed' /var/log/dpkg.log* | sort | tail -n 100
This will show you the last 100 packages installed. Important updates to the Linux kernel typically begin with
2017-08-23 06:55:31 status installed linux-headers-generic:amd64 220.127.116.11.97 2017-08-23 06:55:31 status installed linux-headers-virtual:amd64 18.104.22.168.97 2017-08-23 06:55:31 status installed linux-image-4.4.0-92-generic:amd64 4.4.0-92.115 2017-08-23 06:55:31 status installed linux-image-virtual:amd64 22.214.171.124.97 2017-08-23 06:55:31 status installed linux-virtual:amd64 126.96.36.199.97
If you just want to get rid of the
***System Restart Required*** message without restarting, you can remove the reboot flag file.
sudo rm /var/run/reboot-required
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that’s a lot
After restarting the system I get the following error: `Welcome to Ubuntu 18.04.2 LTS (GNU/Linux 4.15.0-1039-aws x86_64)
How could I solve it?
Obrigado! Me ajudou muito
Actually had a server restart automatically after patching. Not good. I want the server to reboot when I want it to, not when ubuntu thinks it should. Really, Really bad form
I agree, server reboots should always be attended in case of failure. Which version of Linux are you using that restarts the server automatically?
Very nice detailed article!!! THANKS!
update-notifier-commonis installed, Ubuntu will alert you about pending updates via the message of the day (motd) upon console or remote login.
Thanks. I may work that into the article.
After performing sudo reboot I got a 502 bad gateway message on my site…
Are you running Nginx? If so, it’s possible your PHP service may not have started on reboot. I would reboot again and wait for a minute to see if that fixes it. If not, check that your PHP service is running with
sudo service --status-all
How exactly does a package trigger this message after install?
.debfiles (installation packages) there is a post-installation file called
postinst, which is run after installation.
If we take a look at the package
postinstfile contains the following:
The shell script
/var/run/reboot-required.pkgs. This last file contains a list of packages that requested a reboot.
After I restart I still get “packages can be updated” message?
You may need to run
sudo apt-get update,
sudo apt-get upgradeand
sudo apt-get dist-upgradeto update all your packages. Please see article: How to update Ubuntu in terminal.