[SOLVED] /etc/X11/default-display-manager keep content nulled after updates && grades

jamison20000e · 01-27-2014, 03:41 PM

Hi.
/etc/X11/default-display-manager text file has one line /usr/sbin/lightdm in it for GUI-login-screen so I delete that contents to get CLI on logins

then If need GUI can use startx... I want to keep Lightdm installed and made a backup of the original default-display-manager.

As time goes on (updates to it I'd guess) the text finds it's way back so on start no CLI only GUI (until I delete it again.)

Is there a line of code I could replace /usr/sbin/lightdm with to keep it from coming back or add a separate Bash script to empty it; I also assume I can just 'sudo rm /etc/X11/default-display-manager' all together as-well but then updates* put it back?

Thanks In advances for any thought...

jamison20000e · 01-28-2014, 08:28 PM

I tried deleting the file /etc/X11/default-display-manager and oddly enough it put me to the GUI login window

so I must just find a way to just keep text out of there?

jpollard · 01-28-2014, 08:44 PM

What distribution is this? You should never have to delete anything to get to a non GUI login.

It is relatively trivial to get to multi-user mode without the GUI being invoked. For non-systemd based systems it is trivially just setting the initdefault to 3 in the /etc/inittab. For systemd based systems you have to use the command "systemctl set-default multi-user.target".

jamison20000e · 01-28-2014, 09:16 PM

Hi. Thanks for the reply.

Code:

:~$ uname -a
Linux debian 3.12-1-amd64 #1 SMP Debian 3.12.8-1 (2014-01-19) x86_64 GNU/Linux

The command systemctl set-default multi-user.target doesn't work for me:

Code:

systemctl set-default multi-user.target
Unknown operation 'set-default'.

I edited /etc/inittab to 3 and now on booting it asks me for run-level but all levels take me to GUI unless I remove the text from default-display-manager...

TobiSGD · 01-28-2014, 11:42 PM

Debian is not a distro that comes with systemd by default, therefore systemctl will not work. Furthermore, on Debian and most derived systems runlevels 2-5 are the same. To start the system into CLI mode you have to prevent lightdm from being started on the standard runlevel. You can do this with

Code:

update-rc.d lightdm stop 2

to disable lightdem for runlevel 2.

jamison20000e · 01-29-2014, 09:55 AM

Code:

~$ update-rc.d lightdm stop 2
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
update-rc.d: warning: start runlevel arguments (none) do not match lightdm Default-Start values (2 3 4 5)
update-rc.d: warning: stop runlevel arguments (none) do not match lightdm Default-Stop values (0 1 6)

jamison20000e · 02-05-2014, 10:53 AM

I want to keep an empty file but on any updates wipe it empty again, so far I keep using manually:

Code:

cat /dev/null > /etc/X11/default-display-manager

Just found the post using /dve/null http://www.linuxquestions.org/questi...5/#post5048328
http://www.linuxquestions.org/questi...ml#post5065993 and "highjacked" another sorry I kinda realize now ways around this and will try to do so in the future.

jamison20000e · 02-05-2014, 09:28 PM

So, what is the best way to invoke a start up script or command in Linux i.e. a script or command for Linux to run on every start?

TobiSGD · 02-06-2014, 04:27 AM

The best way would be to put the command in rc.local or use the autostart mechanism or your DE/WM. But why don't you just use the advice given to you in the other thread, make the file immutable?

jamison20000e · 02-06-2014, 12:23 PM

I put above it doesn't work unless I've missed something, removing the file brings me to GUI and command outputs are posted. I've used rc.local and autostart before and probably should have searched that, Thank you.