root@devuan:~# apt-get install openrc
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  libeinfo1 librc1
Suggested packages:
  policycoreutils
The following packages will be REMOVED:
  sysv-rc
The following NEW packages will be installed:
  libeinfo1 librc1 openrc
0 upgraded, 3 newly installed, 1 to remove and 3 not upgraded.
Need to get 158 kB of archives.
After this operation, 1477 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://pkgmaster.devuan.org/merged ascii/main arm64 libeinfo1 arm64 0.23-1+b1 [14.8 kB]
Get:2 http://pkgmaster.devuan.org/merged ascii/main arm64 librc1 arm64 0.23-1+b1 [28.4 kB]
Get:3 http://pkgmaster.devuan.org/merged ascii/main arm64 openrc arm64 0.23-1+b1 [115 kB]
Fetched 158 kB in 4s (33.9 kB/s)
Selecting previously unselected package libeinfo1.
(Reading database ... 174277 files and directories currently installed.)
Preparing to unpack .../libeinfo1_0.23-1+b1_arm64.deb ...
Unpacking libeinfo1 (0.23-1+b1) ...
Selecting previously unselected package librc1.
Preparing to unpack .../librc1_0.23-1+b1_arm64.deb ...
Unpacking librc1 (0.23-1+b1) ...
dpkg: sysv-rc: dependency problems, but removing anyway as you requested:
 initscripts depends on sysv-rc | file-rc | openrc; however:
  Package sysv-rc is to be removed.
  Package file-rc is not installed.
  Package openrc is not installed.
 sysvinit-core depends on sysv-rc | file-rc | openrc; however:
  Package sysv-rc is to be removed.
  Package file-rc is not installed.
  Package openrc is not installed.

(Reading database ... 174289 files and directories currently installed.)
Removing sysv-rc (2.88dsf-59.9+devuan2) ...
Selecting previously unselected package openrc.
(Reading database ... 174267 files and directories currently installed.)
Preparing to unpack .../openrc_0.23-1+b1_arm64.deb ...
Unpacking openrc (0.23-1+b1) ...
Setting up libeinfo1 (0.23-1+b1) ...
Setting up librc1 (0.23-1+b1) ...
Processing triggers for libc-bin (2.24-11+deb9u4) ...
Processing triggers for man-db (2.7.6.1-2) ...
Setting up openrc (0.23-1+b1) ...
Add existing services ...
 * service bootlogs added to runlevel recovery
 * service killprocs added to runlevel recovery
 * service motd added to runlevel recovery
 * service single added to runlevel recovery
 * service bootlogs added to runlevel default
 * service motd added to runlevel default
 * service rsyslog added to runlevel default
 * service anacron added to runlevel default
 * service cron added to runlevel default
 * service dbus added to runlevel default
 * service gdomap added to runlevel default
 * service ntp added to runlevel default
 * service rsync added to runlevel default
 * service ssh added to runlevel default
 * service avahi-daemon added to runlevel default
 * service bluetooth added to runlevel default
 * service elogind added to runlevel default
 * service lightdm added to runlevel default
 * service network-manager added to runlevel default
 * service slim added to runlevel default
 * service wicd added to runlevel default
 * service rc.local added to runlevel default
 * service rmnologin added to runlevel default
 * service fake-hwclock added to runlevel sysinit
 * service hostname.sh added to runlevel sysinit
 * service mountkernfs.sh added to runlevel sysinit
 * service eudev added to runlevel sysinit
 * service mountdevsubfs.sh added to runlevel sysinit
 * service hwclock.sh added to runlevel sysinit
 * service checkroot.sh added to runlevel sysinit
 * service checkfs.sh added to runlevel sysinit
 * service checkroot-bootclean.sh added to runlevel sysinit
 * service kmod added to runlevel sysinit
 * service mountall.sh added to runlevel sysinit
 * service mountall-bootclean.sh added to runlevel sysinit
 * service pppd-dns added to runlevel sysinit
 * service procps added to runlevel sysinit
 * service urandom added to runlevel sysinit
 * service networking added to runlevel sysinit
 * service mountnfs.sh added to runlevel sysinit
 * service mountnfs-bootclean.sh added to runlevel sysinit
 * service alsa-utils added to runlevel sysinit
 * service bootmisc.sh added to runlevel sysinit
 * service screen-cleanup added to runlevel sysinit
 * service x11-common added to runlevel sysinit
 * service unattended-upgrades added to runlevel off
 * service sendsigs added to runlevel off
 * service umountnfs.sh added to runlevel off
 * service umountfs added to runlevel off
 * service umountroot added to runlevel off
 * service savecache added to runlevel off
 * Caching service dependencies ...                                                                                [ ok ]
**********************************************************************
*** WARNING: if you are replacing sysv-rc by OpenRC, then you must ***
*** reboot immediately using the following command:                ***
for file in /etc/rc0.d/K*; do s=`basename $(readlink "$file")` ; /etc/init.d/$s stop; done
**********************************************************************
root@devuan:~# for file in /etc/rc0.d/K*; do s=`basename $(readlink "$file")` ; /etc/init.d/$s stop; done
[ ok ] Shutting down ALSA...done.
[ ok ] Stopping bluetooth: /usr/sbin/bluetoothd.
[ ok ] Stopping session management daemon: elogind.
Stopping fake hwclock: saving system time.
[info] GNUstep distributed object mapper disabled.
[ ok ] Stopping Light Display Manager: lightdm.
[ ok ] Stopping network connection manager: NetworkManager.
[FAIL] Stopping X display manager: slim failed!
[ ok ] Stopping Network connection manager: wicd.
[ ok ] Stopping Avahi mDNS/DNS-SD Daemon: avahi-daemon.
[....] Asking all remaining processes to terminate...Connection to devuan closed by remote host.
Connection to devuan closed.