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---
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title: How to enable hibernation in three simple steps
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tags: [hibernation, parabola, systemd, mkinitcpio, syslinux]
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updated: 2017-10-22 18:30
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description: How to enable hibernation on systemd and mkinitcpio-based systems
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---
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Greetings to all,
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It has been some time since I needed to enable hibernation on my machine so
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that I could find all my stuff exacly as I left it the previous time. This
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is especially useful to me since I usually leave multiple terminals opened. So,
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untill recently, I suspended instead of hibernate, but that is not
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always practical.
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What follows is a summary of instuctions I gathered from
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[multiple](https://wiki.archlinux.org/index.php/Power_management/Suspend_and_hibernate)
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[sources](https://wiki.archlinux.org/index.php/Mkinitcpio#Image_creation_and_activation)
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and it reflects my use case and configuration.
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## Prerequisites
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- A swap partition with size >= RAM size.
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- Systemd
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- mkinitcpio
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- A bootloader that supports kernel parameters.
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## Step 1
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Get the UUID of your swap partition.
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# UUID="$(blkid | grep swap | awk '{print $2}' | tr -d "\"")"
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## Step 2
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Edit the `/etc/mkinitcpio.conf` file to include `resume` after `udev` in the
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`HOOKS` section. This is how mine looks:
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HOOKS="base udev mdadm_udev lvm2 resume autodetect modconf block filesystems keyboard fsck"
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Then we must regenerate the ramdisk environment (please get the
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correct kernel names first). For example:
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# mkinitcpio -p linux-libre
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# mkinitcpio -p linux-libre-lts
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## Step 3
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Copy the variable you gathered earlier.
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$ echo $UUID
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Append the `resume` kernel parameter to your bootloader configuration. For
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example, this would be a modified Syslinux entry to accomodate the new
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parameter.
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LABEL <some label>
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MENU LABEL <some value>
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LINUX <some other value>
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APPEND <yet again other values> resume=<paste the $UUID variable here>
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INITRD <and again>
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## Testing
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$ systemctl hibernate
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That's it.
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Enjoy.
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