Add a command to uninstall TLJH

I’ve had a few moments where I need to delete the hub and just start fresh. I know to delete /opt/tljh, but I always feel like I might be missing something. Moreover, most people probably won’t think to check /opt/tljh. What if we added a tljh-config clean command that would require you to confirm, and if so would completely erase all jupyterhub-related changes to the machine?

[olivierverdier]

At least instructions as to which files are installed where would be welcome. As far as I can see, the following locations would have to be removed during an uninstall:

• /opt/tljh (directory)
• /usr/bin/tljh-config (symlink)

Then there is the three services located at:

• /etc/systemd/system/configurable-http-proxy.service
• /etc/systemd/system/traefik.service
• /etc/systemd/system/jupyterhub.service ~but I don’t know how to remove them in the appropriate way.~

Edit: you would remove those services by first running sudo systemctl disable <service>, and then remove the files themselves, I guess.

Two other things to do are

• Remove the jupyterhub-admins and jupyterhub-users groups with sudo delgroup <group>
• Remove the extra sudoers file located at /etc/sudoers.d/jupyterhub-admins.

Of course, as @yuvipanda said, if you allowed your users to run arbitrary command, then there is no point at all in uninstalling. However, in some cases it might make sense to include the information above in the documentation.

[GeorgianaElena]

@choldgraf, I just added this issue to my todo list. I’ll look into it, try to track down the limitations and come up with some steps.