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Asked: 2024-09-25T00:27:34+05:30 In: ,

How can I initiate suspend or hibernate mode on my Ubuntu system using command line commands?

I’ve been diving into using Ubuntu lately, and I’ve come across a couple of situations where I really needed to put my system into either suspend or hibernate mode, but I wanted to do it via the command line instead of the usual GUI options. Honestly, it feels a bit more ‘techie’ to me, and I think it could be super handy for when I’m working in the terminal.

Here’s the scenario: I’m working on some coding projects, and I like to have a bunch of terminal windows open, but I often have to step away for a bit. I’m aware that suspending the system saves the current state and allows me to pick up right where I left off, which is great. However, hibernating it would be even more beneficial since it completely powers down the machine and saves everything to the disk, which is essential for those long breaks when I know I won’t be back in a while.

So, my question is, how can I initiate suspend or hibernate mode using command line commands? I’ve looked around a bit but still feel like I’m missing something crucial. I came across some commands like `systemctl suspend` and `systemctl hibernate`, but I can’t really tell if those are the right ones or if I need to do some setup before they’ll work effectively.

Also, does anyone know if there’s a difference in how these modes affect different hardware? I’ve heard a few things about some laptops having issues with hibernation or not waking up properly after suspend, which kind of makes me nervous. Are there any additional flags or things to consider when using these commands?

I’d love to hear your experiences and any tips you might have. If you could share how you’ve implemented this or if there’s a better way to go about it, I’d really appreciate it! Thanks in advance for any guidance you can offer!

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    2 Answers

    1. To initiate suspend or hibernate mode via the command line in Ubuntu, you can indeed use the commands `systemctl suspend` and `systemctl hibernate`. These commands are straightforward and should work effectively on most modern hardware. However, it’s essential to ensure that your system is configured correctly for hibernation, as it requires adequate swap space that is at least as large as your RAM to save the session. You can check your swap space with the command `swapon –show`. If hibernation doesn’t work initially, you may need to edit your `/etc/default/grub` file to ensure that a hibernation resume parameter is set correctly, followed by running `sudo update-grub` to apply the changes.

      As for hardware differences, some laptops may have compatibility issues with hibernation or may not wake up properly after suspend depending on driver support and system settings. If you’re using a laptop, it’s good to test both modes to see how your specific hardware behaves. Additionally, when using these commands, consider using `systemctl suspend –no-block` if you want the command to run asynchronously, allowing you to continue working in the terminal. It’s also wise to check logs in `/var/log/syslog` or use `journalctl -xe` if you encounter any issues after system wake-up. Always keep your system updated to mitigate any potential bugs that are related to power management.



    2. Using Suspend and Hibernate in Ubuntu

      Suspend and Hibernate in Ubuntu via Command Line

      If you’re looking to use the command line to suspend or hibernate your Ubuntu machine, you’ve got the right idea with the systemctl commands!

      Basic Commands

      • To suspend your system, you can simply run:

        • systemctl suspend

      • For hibernate, use:

        • systemctl hibernate

      Do I Need to Set Up Anything?

      While the commands above should work on most systems, you might need to ensure that hibernation is supported on your hardware. Not all machines handle it well, and sometimes you need to configure swap space correctly. A good rule of thumb is that your swap partition should be at least as large as your RAM for hibernation to work properly. You can check your swap size with:

      swapon --show

      Hardware Considerations

      About the concerns with hardware, yeah, some laptops might have issues with hibernation, like not waking up properly. A lot of times, it could depend on the drivers or power management settings in the BIOS. If you’re having trouble, you might want to check the manufacturer’s forums or support for any specific issues related to your model.

      Extra Tips

      If you want to really make things easy, you can create aliases in your shell config file (like .bashrc or .zshrc) to make these commands shorter:

          alias suspend='systemctl suspend'
    alias hibernate='systemctl hibernate'

      Then, just type suspend or hibernate in the terminal to trigger those actions!

      Final Thoughts

      Playing around with command-line options can be a lot of fun, and knowing how to suspend or hibernate from the terminal definitely gives you that ‘techie’ vibe! Just keep in mind your hardware, and don’t hesitate to experiment (but always save your work first!). Happy coding!


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