As long as the admin password is kept the same,
a running browser tab will keep its login credentials -
no matter if
- the system is rebooted
- the system is shutdown and restarted
- the system is installed onto another disk
- even an old version is re-installed
Any of these events should render the credentials “invalid”,
requiring a new login authentication.
In my case, for analysis pruposes, I re-installed an image from 2018-04, based upon cu119, to a different SSD in that system: just booted - and: voila!, was able to re-use the “surviving session”.
In (positive) contrast, as to be expected:
- during the login, .bashrc ensures that the user gets logged out automatically after some minutes of inactivity
- you may open a time-unlimited ssh connection at your responsibility - but ssh at least takes care this will not survive any of the above
Bug 12844 - Web User Interface: Authentication survives reboots, shutdowns, even re-installs