How to modify systemd-boot on Linux

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Do you’ve a number of kernels in your Linux server, however aren’t prompted to pick out which you need to run? The repair for that may lie in systemd-boot configuration.

The right way to modify systemd-boot on Linux
Do you’ve a number of kernels in your Linux server, however aren’t prompted to pick out which you need to run? The repair for that may lie in systemd-boot configuration.

Once you boot up a Linux server or desktop that makes use of systemd, you may not have observed that the boot course of is barely completely different than the old fashioned methodology. Nonetheless, if you happen to’ve run into a difficulty with a kernel, it turns into fairly clear one thing has modified.

It was once, when your had a machine with a number of accessible kernels, you might achieve entry to the GRUB menu and choose which kernel in addition. If that choice wasn’t configured by default, you might alter the /and so forth/default/grub file in such a method as to provide you entry. The choice for configuration is:

GRUB_HIDDEN_TIMEOUT=

By default that choice is about to zero. Change that to a worth of, say, 5 and you’d then have 5 seconds (after preliminary boot) to pick out what kernel you needed to make use of. After all, after making the change to the grub configuration file, you’d must run sudo update-grub so the modifications would take impact.

That is all effective and good, if you happen to’re utilizing a machine that does not depend on systemd-boot. In case your machine does use systemd-boot (and is determined by UEFI boot mode) you need to go about issues a bit otherwise. How? Let me present you.

SEE: Selecting your Home windows 7 exit technique: 4 choices  (Tech Professional Analysis)

Configuring systemd-boot

Open a terminal window and concern the command:

sudo -s

After typing your consumer’s sudo password you can find your self at a root immediate. You need to have that degree of entry, in any other case you can’t view or edit the contents of the mandatory listing.

Now that you’ve got the right entry, concern the command:

sudo nano /boot/efi/loader/loader.conf

That file may solely include a single line, or a brief few strains (relying in your distribution). For instance, Pop!_OS incorporates solely two strains:

default Pop_OS-current
timeout zero

What you have to do is about the timeout to a worth of 5 or ten seconds (or no matter worth gives you sufficient time to pick out the kernel you need to boot). As soon as you have made that change, save and shut the file.

That is it. Reboot your machine, and try to be greeted by a display screen permitting you to pick out the kernel you want to run.

Failsafe

One of many issues that has all the time set Linux other than different working methods is the flexibility to maintain a number of kernels on a single machine, and deciding on which one you need to boot. This makes it doable so that you can all the time have a failsafe kernel on the prepared, ought to an improve trigger issues. Now you realize, whether or not your machine makes use of the tried and true grub or the newer systemd-boot course of, how you can make it doable to pick out that kernel.

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