Hello Linux Geeksters. As you may know, both Debian 8.0 Jessie and Ubuntu 15.04 Vivid Vervet have replaced Upstart with systemd as their default init service manager.
The default init system (either /sbin/systemd or /sbin/upstart) run with PID 1 as /sbin/init).
While it is already used on other popular Linux systems like Arch Linux or Fedora systems, a lot of Linux fans do not want Red Hat’s systemd. But that is not a big problem, the Ubuntu 15.04 users can easily return to Upstart.
Switch back to Upstart, on Ubuntu 15.04 Vivid Vervet and an official flavor:
$ sudo apt-get install upstart-sysv
$ sudo apt-get remove ubuntu-standard systemd-sysv
$ sudo update-initramfs -u
$ sudo reboot
Reboot and choose *Ubuntu, … (upstart) from your grub menu.
To revert the changes and bring back systemd, do:
$ sudo apt-get install ubuntu-standard systemd-sysv
$ sudo apt-get remove upstart-sysv
$ sudo update-initramfs -u
$ sudo reboot
Reboot and choose *Ubuntu, … (systemd) from your grub menu.