The System restart required message indicates the presence of the file /var/run/reboot-required. The presence of that file indicates there is a package that has requested a system reboot. Normally Ubuntu and Debian packages can trigger the creation of this file in their post-installation script postinst.
Full Answer
How to start, stop or restart services in Ubuntu?
Using systemctl to start, stop, and restart Ubuntu services
- Stop service using systemctl. The command doesn’t give any output if the execution is successful.
- Checking Service Status using systemctl. We can check the service status using the below command.
- Start service using systemctl. Notice that when we had stopped the service, the “Active” value was inactive (dead). ...
- Restart service using systemctl. ...
How to update your Ubuntu system?
With a single command, uCareSystem will:
- Update all available packages
- Update your Ubuntu system.
- Download and install updates.
- Check for the list of old Linux Kernels and uninstall them
- Clear the apt cache folder
- Uninstall packages that are obsolete and no longer needed
- Uninstall orphaned packages
- Delete package settings (from software you have previously uninstalled)
How to schedule a nightly reboot of the Ubuntu Server?
You can schedule a restart in your Ubuntu Linux server with "shutdown" command with Reboot switch (-t) and time options. A command example to schedule a restart ubuntu server at 22:00 (Use 24hr time format). user@ubuntu:~$ sudo shutdown -r 22:00.
How do I restart SSH or sshd on Ubuntu?
- Open the terminal with Ctrl+Alt+T and install the openssh-server package: sudo apt update sudo apt install openssh-server Copy Copy When prompted, enter your password and press Enter to continue with ...
- Once the installation is complete, the SSH service will start automatically. ...
- Ubuntu ships with a firewall configuration tool called UFW. ...
Why does Ubuntu server say system restart required?
A system restart is generally required when an update to the Linux kernel has been installed. Its really up to you what you want to do if you see the 'System restart required' message. If you can restart the system, you should do it. If there are constraints, restart your system for high, critical or emergency patches.
Is reboot required Ubuntu?
You must reboot your Linux box when your install a new kernel or update critical libraries such as libc. Both Debian and Ubuntu Linux can tell you if the system needs a reboot when you login to your box as root user.
Why do you need to restart a server?
Restarting a server closes all the processes that are running and starts them again. Rebooting a server closes all running processes and reboots the server. Rebooting a server is more intrusive than restarting a server and takes longer, and is typically used if restart does not resolve the issue.
How do I know if Linux needs a reboot?
You can use it both for checking if a full reboot is required because of kernel or core libraries updates (using the -r option), or what services need to be restarted (using the -s option). needs-restarting -r returns 0 if reboot is not needed, and 1 if it is, so it is perfect to use in a script.
What is reboot Ubuntu?
The reboot command is the simplest way to restart your system; in a way that it does not power off and then on during this process. The command usually is used with no further flags/options. Simply using this command as follows will reboot your Ubuntu then n there: $ reboot.
What is sudo reboot?
Various command line examples are: To reboot, use any one of the following commands: sudo reboot. sudo shutdown -r now This will perform a system shutdown in a proper way and then reboot the computer.
How do I restart Ubuntu?
To reboot the Linux system from a terminal session, sign in or “su”/”sudo” to the “root” account. Then type “ sudo reboot ” to reboot the box. Wait for some time and the Linux server will reboot itself.
How often should I reboot my Linux server?
Linux servers never need to be rebooted unless you absolutely need to change the running kernel version. Most problems can be solved by changing a configuration file and restarting a service with an init script.
What is difference between restart and reboot?
In more technical words, to reboot or restart something means to cycle the power state. When you turn the device off, it's not receiving power. When it's turned back on, it is getting power. A restart/reboot is a single step that involves both shutting down and then powering on something.
What does reboot your system mean?
Rebooting your computer involves two steps – shutting down the computer and then starting it up again. When you reboot/restart your computer, it will lose power during the process and start up again on its own. Your computer itself will occasionally prompt you to restart it, usually after downloading an update.
Does Linux need reboot after update?
Resolution. Red Hat recommends that systems be rebooted after installation of an updated package. This ensures that all processes and services benefit from updates to core libraries and services.
Does Linux patching require reboot?
With versions of Linux before 4.0, when the kernel is updated via a patch, the system needs to reboot. Kernel patches are released for a number of reasons, but fixing security holes is the most frequent reason. This is why it's important to install the patch as soon as possible.
Do you need to reboot Linux after update?
Resolution. Red Hat recommends that systems be rebooted after installation of an updated package. This ensures that all processes and services benefit from updates to core libraries and services.
What is var run reboot required?
The /run/reboot-required mechanism is used when a reboot is needed to fully apply the changes introduced by package installation or upgrade. Typically it is the postinst maintainer script that touches /run/reboot-required , at the end of a successful configuration of the package.
Does glibc require reboot?
Yes, you should reboot. Glibc provides the C library used by virtually every program on the system; all must be restarted in order to use the newly installed version.
What does reboot your system mean?
Rebooting your computer involves two steps – shutting down the computer and then starting it up again. When you reboot/restart your computer, it will lose power during the process and start up again on its own. Your computer itself will occasionally prompt you to restart it, usually after downloading an update.
What does it mean when a system restart is required?
The message saying a system restart is required just means one (or more) of those updates won't take effect until you reboot the machine. If none of the updates you applied are urgent fixes (eg a security flaw in the kernel) then you can just leave it. Quite often updates come down the pipe which will recommend a restart, but I often wait until something important gets upgraded before I'll perform the actual update.
Is the update notification real time?
It could be a cached message then. The update notification messages aren't real time, they are generated periodically. You may just be looking at a message which was relevant prior to your last reboot.
How to trigger /var/run/reboot-required?
Debian and Ubuntu packages can trigger the creation of /var/run/reboot-required* in their postinst file by executing the helper script /usr/share/update-notifier/notify-reboot-required
Which script generates the reboot required part of Motd?
The script that generates the reboot required part of motd is /usr/lib/update-notifier/update-motd-reboot-required which contains:
Does /var/run/reboot-required get created?
Note: for debian systems, /var/run/reboot-required does not get created unless the update-notifier-common package is installed.
Does shell script generate anything?
that shell script isn't generating anything. It displays the contents if it exists
Does Nagios check for /var/run/reboot-required?
Your nagios check could check for the existence of /var/run/reboot-required.
When do you need to restart Linux?
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.
Does Linux require a restart?
Above we can see there is a Linux kernel security update linux-image-4.4.0-92-generic and linux-base, which requires a system restart.
