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110 lines
4.2 KiB
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[#]: subject: "How to Access the GRUB Menu in Virtual Machine"
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[#]: via: "https://itsfoss.com/access-grub-virtual-machine/"
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[#]: author: "Sagar Sharma https://itsfoss.com/author/sagar/"
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[#]: collector: "lkxed"
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[#]: translator: " "
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[#]: reviewer: " "
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[#]: publisher: " "
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[#]: url: " "
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How to Access the GRUB Menu in Virtual Machine
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======
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Most modern VMs are configured to skip the [GRUB bootloader][1] for a seamless experience.
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However, you might need to access the GRUB menu at times. For example, if you want to switch back to the older kernel or get into recovery mode for [resetting the password][2].
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> 💡 Reboot your VM and keep the Shift key pressed when it is booting up again. This should give you the GRUB menu.
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In this quick article, I will be showing you two ways to access the GRUB menu in Linux running in a virtual machine:
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- A temporary solution (when you have to access GRUB once or twice)
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- A permanent solution (will show GRUB at every boot)
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As most of the users are not going to interact with the grub on a daily basis, I will start with a temporary solution in which you can access the grub without any tweaks.
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> 📋 I have used Ubuntu in the tutorial here but the steps should be valid for other Linux distributions as well.
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### Access the GRUB bootloader in VM (Quick way)
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If you want to access the GRUB occasionally, this is supposed to be the best way as it does not require any configuration.
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Just reboot your system and keep the `shift` key pressed.
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That's it!
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You will have your grub menu without any time limit:
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![Accessing grub menu in VM using shift key][3]
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Pretty simple way. Isn't it?
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But it will work for that specific boot only. So what if you want to have the grub on every boot? Refer to the given method.
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### Enable Grub menu in virtual machines permanently (if you want to)
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> 🚧 This method requires changing Grub config file in the command line. Please ensure that you are comfortable doing the edits in the terminal.
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If you have to deal with the grub menu to access the other operating systems or change[boot from the older kernels][4] often, this method is just for you.
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To make the grub accessible at every boot, you must make changes in the configuration file.
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First, open the grub config file using the following command:
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```
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sudo nano /etc/default/grub
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```
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Here, change the `GRUB_TIMEOUT_STYLE=hidden` to the `GRUB_TIMEOUT_STYLE=menu`:
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![change grub timeout style][5]
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Next, in the same config file, specify for how many seconds you want the grub to be displayed.
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I would recommend 5 seconds as it seems to balance between not too long and short (yep, quite relatable):
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```
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GRUB_TIMEOUT=5
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```
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![configure grub timeout in ubuntu][6]
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And finally, you can [save the changes and exit from the nano][7] text editor.
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To activate the changes you made to the config file, update the grub using the following command:
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```
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sudo update-grub
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```
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That's it. Reboot your system and the grub should be there for 5 seconds.
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### How about theming GRUB?
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You will get the grub bootloader in most of the Linux distros as it is quite simple to configure and gets the job done.
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But by default, it's nothing apart from the black background and plain text. So we made a guide on how you can make it look dope:
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I hope you will find this guide helpful and if you have any queries, let me know in the comments.
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--------------------------------------------------------------------------------
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via: https://itsfoss.com/access-grub-virtual-machine/
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作者：[Sagar Sharma][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://itsfoss.com/author/sagar/
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[b]: https://github.com/lkxed/
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[1]: https://itsfoss.com/what-is-grub/
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[2]: https://itsfoss.com/how-to-hack-ubuntu-password/
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[3]: https://itsfoss.com/content/images/2023/07/access-GRUB-in-Ubuntu-VM.gif
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[4]: https://itsfoss.com/boot-older-kernel-default/
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[5]: https://itsfoss.com/content/images/2023/07/change-grub-style.webp
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[6]: https://itsfoss.com/content/images/2023/07/configure-grub-timeout-in-ubuntu.webp
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[7]: https://linuxhandbook.com/nano-save-exit/
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