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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Systemd 254 - now with soft-reboot (github.com)

submitted 1 year ago by [email protected] to c/[email protected]

20 comments fedilink hide all child comments

Systemd 254 released and now has a new soft-reboot option:

    * A new "soft-reboot" mechanism has been added to the service manager.
      A "soft reboot" is similar to a regular reboot, except that it
      affects userspace only: the service manager shuts down any running
      services and other units, then optionally switches into a new root
      file system (mounted to /run/nextroot/), and then passes control to a
      systemd instance in the new file system which then starts the system
      up again. The kernel is not rebooted and neither is the hardware,
      firmware or boot loader. This provides a fast, lightweight mechanism
      to quickly reset or update userspace, without the latency that a full
      system reset involves. Moreover, open file descriptors may be passed
      across the soft reboot into the new system where they will be passed
      back to the originating services. This allows pinning resources
      across the reboot, thus minimizing grey-out time further. This new
      reboot mechanism is accessible via the new "systemctl soft-reboot"
      command.>

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[–] [email protected] 10 points 1 year ago (2 children)

Support for System V service scripts is now deprecated and will be removed in a future release. Please make sure to update your software now to include a native systemd unit file instead of a legacy System V script to retain compatibility with future systemd releases.

Why is this being removed?

I wouldn't use it but it certainly seems handy for a quick hack and also for people who are used to the old ways.

[–] [email protected] 45 points 1 year ago (1 children)

Maintaining legacy options is always maintenance overhead or things you need to work around when implementing new features. I suspect that they've concluded that not enough people use it anymore to justify the overhead.

[–] [email protected] 19 points 1 year ago* (last edited 1 year ago)

Yeah it’s not like service files are difficult to write. They’re certainly easier than sysv init files