Public bug reported:

I installed apache2 on Ubuntu 16.04, and out of the box it was enabled
as a service, meaning it would automatically start at every boot. That
is not what I want as this is my personal computer, not a server.

$ systemctl is-enabled apache2.service 
enabled


So I ran:

$ sudo systemctl disable apache2

and this was the output:
   apache2.service is not a native service, redirecting to systemd-sysv-install
   Executing /lib/systemd/systemd-sysv-install disable apache2
   insserv: warning: current start runlevel(s) (empty) of script `apache2' 
overrides LSB defaults (2 3 4 5).
   insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script 
`apache2' overrides LSB defaults (0 1 6).
   insserv: warning: current start runlevel(s) (empty) of script `apache2' 
overrides LSB defaults (2 3 4 5).
   insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script 
`apache2' overrides LSB defaults (0 1 6).

Then I rebooted. I expected to find apache2 not running. Instead, it was 
running.
Surprisingly:

$ systemctl is-enabled apache2.service 
apache2.service is not a native service, redirecting to systemd-sysv-install
Executing /lib/systemd/systemd-sysv-install is-enabled apache2
disabled

so, it shows up as disabled, yet it is started at startup.


I wonder if this is what those warnings were about. Those messages are unclear 
as fuck, I have no f***ing clue what they are supposed to mean. I read that the 
CURRENT runlevel overrides a DEFAULT. I guess that should be fine, unless what 
systemctl actually changes are the defaults, and those are overwritten by 
something else, which means that "sysctl disable" will have no effect. If that 
is the case, then the warning should be more explicit:
- be specific about the fact that "LSB defaults" are what the command is 
changing
- tell me that as a result, the services will not be disabled
- tell me WHAT is overriding the defaults that I'm attempting to change
- and/or tell me what I am supposed to do to fix the issue

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: systemd 229-4ubuntu21.4
ProcVersionSignature: Ubuntu 4.4.0-133.159-generic 4.4.134
Uname: Linux 4.4.0-133-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Aug 15 16:26:28 2018
InstallationDate: Installed on 2013-10-11 (1768 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Acer Aspire V3-571G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-133-generic.efi.signed 
root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/15/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.07
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: VA50_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.07
dmi.modalias: 
dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07:
dmi.product.name: Aspire V3-571G
dmi.product.version: V2.07
dmi.sys.vendor: Acer

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages xenial

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https://bugs.launchpad.net/bugs/1787225

Title:
  systemctl disable apache2 does nothing

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