# These are all services which have native implementations
# So we mask them by linking against /dev/null or create an alias
/lib/systemd/system/systemd-random-seed.service /lib/systemd/system/urandom.service
/lib/systemd/system/systemd-sysctl.service /lib/systemd/system/procps.service

/lib/systemd/system/rc-local.service /lib/systemd/system/rc.local.service

/lib/systemd/system/systemd-modules-load.service /lib/systemd/system/module-init-tools.service
/lib/systemd/system/systemd-modules-load.service /lib/systemd/system/kmod.service
/etc/modules /etc/modules-load.d/modules.conf

# X server and ICE socket directories are created by /usr/lib/tmpfiles.d/x11.conf
/dev/null /lib/systemd/system/x11-common.service

# systemd sets the hostname internally during early boot
/dev/null /lib/systemd/system/hostname.service

# /run/nologin is handled by systemd-user-sessions.service
/dev/null /lib/systemd/system/rmnologin.service
/dev/null /lib/systemd/system/bootmisc.service

# Although bootlogd is disabled by default (via /etc/default/bootlogd)
# by masking them we avoid spawning a shell uselessly thrice during boot.
# Besides, bootlogd doesn't look particularly useful in a systemd world.
/dev/null /lib/systemd/system/bootlogd.service
/dev/null /lib/systemd/system/stop-bootlogd-single.service
/dev/null /lib/systemd/system/stop-bootlogd.service

# Don't set the hwclock, as the kernel does that on its own when using NTP
# Without NTP, we shouldn't store the time either
# https://github.com/systemd/systemd/commit/da2617378523e007ec0c6efe99d0cebb2be994e1
/dev/null /lib/systemd/system/hwclock.service

# We use native mount support so mask those services
# TODO: check if any SysV init scripts depend on those facilities
/dev/null /lib/systemd/system/mountkernfs.service
/dev/null /lib/systemd/system/mountdevsubfs.service
/dev/null /lib/systemd/system/mountall.service
/dev/null /lib/systemd/system/mountall-bootclean.service
/dev/null /lib/systemd/system/mountnfs.service
/dev/null /lib/systemd/system/mountnfs-bootclean.service
/dev/null /lib/systemd/system/umountfs.service
/dev/null /lib/systemd/system/umountnfs.service
/dev/null /lib/systemd/system/umountroot.service
/dev/null /lib/systemd/system/checkfs.service
/dev/null /lib/systemd/system/checkroot.service
/dev/null /lib/systemd/system/checkroot-bootclean.service

# We use the built-in cryptsetup support
/dev/null /lib/systemd/system/cryptdisks.service
/dev/null /lib/systemd/system/cryptdisks-early.service

# Single user mode is implemented natively, don't use legacy SysV init scripts
# to avoid spawning sulogin twice.
/dev/null /lib/systemd/system/single.service
/dev/null /lib/systemd/system/killprocs.service

# Those services are useless under systemd. Mask them so they can't
# be run manually by accident.
/dev/null /lib/systemd/system/sendsigs.service
/dev/null /lib/systemd/system/halt.service
/dev/null /lib/systemd/system/reboot.service
/dev/null /lib/systemd/system/rc.service
/dev/null /lib/systemd/system/rcS.service

# The motd SysV init script is no longer required to create the dynamic part of
# /etc/motd to display the uname information as pam_exec is used for that now.
# An explicit Breaks against older versions of login, which still use
# /run/motd.dynamic, is not necessary, as pam_motd will silently ignore it if
# that file is missing and simply display nothing.
# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=735521
/dev/null /lib/systemd/system/motd.service

# We have the journal to handle kernel messages from early boot
/dev/null /lib/systemd/system/bootlogs.service

# Enable Debian specific units
/lib/systemd/system/getty-static.service /lib/systemd/system/getty.target.wants/getty-static.service

# Compat symlink
/lib/systemd/systemd /bin/systemd

# Create a compat symlink as systemd-sysctl no longer reads /etc/sysctl.conf
/etc/sysctl.conf /etc/sysctl.d/99-sysctl.conf