Povolení hibernace na Linuxu

Povolení hibernace pro Ubuntu 18.04 se swap souborem:

• Make your /swapfile have at least the size of your RAM

   sudo swapoff /swapfile
   sudo dd if=/dev/zero of=/swapfile bs=$(cat /proc/meminfo | grep MemTotal | grep -oh '[0-9]*') count=1024 conv=notrun
   sudo mkswap /swapfile
   sudo swapon /swapfile

   Note the UUID of the partition containing your /swapfile:

   $ sudo findmnt -no SOURCE,UUID -T /swapfile
   /dev/nvme0n1p5 20562a02-cfa6-42e0-bb9f-5e936ea763d0

• Reconfigure the package uswsusp in order to correctly use the swapfile:

   sudo apt install uswsusp
   sudo dpkg-reconfigure -pmedium uswsusp
   # Answer "Yes" to continue without swap space
   # Select "/dev/disk/by-uuid/20562a02-cfa6-42e0-bb9f-5e936ea763d0" replace the UUID with the result from the previous findmnt command
   # Encrypt: "No"

• Edit the SystemD hibernate service using sudo systemctl edit systemd-hibernate.service and fill it with the following content:

   [Service]
   ExecStart=
   ExecStartPre=-/bin/run-parts -v -a pre /lib/systemd/system-sleep
   ExecStart=/usr/sbin/s2disk
   ExecStartPost=-/bin/run-parts -v --reverse -a post /lib/systemd/system-sleep

• Note the resume offset of your /swapfile:

   $ sudo swap-offset /swapfile
   resume offset = 34818

• Configure Grub to resume from the swapfile by editing /etc/default/grub and modify the following line:

   GRUB_CMDLINE_LINUX_DEFAULT="resume=UUID=20562a02-cfa6-42e0-bb9f-5e936ea763d0 resume_offset=34818 quiet splash"

• Update Grub:

   sudo update-grub

• Create the following /etc/initramfs-tools/conf.d/resume:

   RESUME=UUID=20562a02-cfa6-42e0-bb9e-5e936ea763d0 resume_offset=34816
   # Resume from /swapfile

• Update initramfs:

   sudo update-initramfs -u -k all

Now you can hibernate with:

sudo systemctl hibernate.

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