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I installed Ubuntu server on a PC, with correct user + password.

We installed webmin, and we are running a website on this PC. It works. I can remotely update webmin and ubuntu package.

However, I am facing a serious issue: I cannot log in on a session using user + password.

What happens here: when entering the correct password, the session intends to open for 1sec, screen becomes black as if I enter in the session, but it comes back to the user/password menu, as if my password was wrong.

But I confirm that my password is correctly input as well as user name.

First I though that we made a mistake during installation by defining a wrong password, because of keyboard definition (as we are in Japan), but it seems that the problem is not this one.

So it is still impossible to enter in any session excepted guest session.

However, even I tried to login as admin or root, it does not work too.

So the web site works! I can update remotely ubuntu, but I cannot enter in the session when I am in front of the computer! It is really difficult for me to understand and to recover this strange problem.

Any idea will be really helpful!

Lety
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anton
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2 Answers2

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This may be caused by a number of reasons, many being explained here. It's almost always caused by some misconfiguration (i.e. you've done something wrong).

It also happened to me, and it turned out that I've screwed my PATH environment variable, so no command was working. I've done this with a simple mistake in my ~/.profile file. Instead of putting there:

export PATH="$GOROOT/bin:$PATH"

I've put:

export PATH="$GOROOT/bin"

thus removing everything from PATH except for go. And after rebooting, I've ended up in an infinite login loop.

No matter the actual cause, chances are that you'll be able to login to the shell instead of GUI, by pressing Ctrl+Alt+F3. Once you're in, you can troubleshoot/fix the issue.

I hope it helps. Good luck!

Kulfy
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Aleksandar Pesic
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I've had this problem before and it can be caused by a countless number of things (for me it was a script that ran on login that was crashing). So I cant help with a fix but I can point you to the possible problem.

First take a look at your logs to see what error is causing your account to be logged out straight away.

they should be located in

var/log/

or

/var/log/syslog

you might be able to access these via your guest account (depending on how you set it up).

you also should be able to read you logs via webmin under

system > system logs

http://doxfer.webmin.com/Webmin/SystemLogs

but it can vary depending on how you setup webmin.

Avenyet
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