Root login not working with Warrior

Root login not working with Warrior

[Teemu K.]

Hi,

I have Yocto image that was originally made with Thud - version of
Yocto. It was working fine and I was able to login as root via serial
console.

Then I updated Yocto to Warrior and now for some reason when I try to
login as root via serial console it says 'login incorrect' when I
enter 'root' as a user and press enter. It doesn't even ask any
passwords before saying that. I tried enabling debug-tweaks and still
the same. Can't login as a root.

I have another user that I can login just fine and with sudo I can
also use root access. I just can't login as root.

I looked through /etc/passwd and /etc/shadow and they looked okay. Has
something changed in Warrior regarding this? I tried googling, but
didn't find anything.

-Teemu K.

Re: [yocto] Root login not working with Warrior

[Randy MacLeod]

On 1/13/20 10:37 AM, Teemu K. wrote:
> Hi,
> 
> I have Yocto image that was originally made with Thud - version of
> Yocto. It was working fine and I was able to login as root via serial
> console.
> 
> Then I updated Yocto to Warrior and now for some reason when I try to
> login as root via serial console it says 'login incorrect' when I
> enter 'root' as a user and press enter. It doesn't even ask any
> passwords before saying that. I tried enabling debug-tweaks and still
> the same. Can't login as a root.
> 
> I have another user that I can login just fine and with sudo I can
> also use root access. I just can't login as root.
> 
> I looked through /etc/passwd and /etc/shadow and they looked okay. Has
> something changed in Warrior regarding this? I tried googling, but
> didn't find anything.

Hi Teemu,

I'm not sure what's wrong but you can always add strace to your image,
login as a user and run:
   $ sudo strace -f -o /tmp/trace-[root|user].log -p <pidof login>
where the pid you specify is either the login process or agetty. I'd
have to try it to figure out what process to trace.

If you do that and then login as 1) root and then 2) as a user, you can
compare the strace logs and usually figure out what the difference is.
The logs will be verbose and do require some expertise to understand
but that should help. ltrace is also sometimes helpful.

Good luck,
../Randy

> 
> -Teemu K.
> 
> 
> 
> 


-- 
# Randy MacLeod
# Wind River Linux

Re: [yocto] Root login not working with Warrior

[Paul Eggleton]

Hi Teemu

On Tuesday, 14 January 2020 4:37:29 AM NZDT Teemu K. wrote:
> I have Yocto image that was originally made with Thud - version of
> Yocto. It was working fine and I was able to login as root via serial
> console.
> 
> Then I updated Yocto to Warrior and now for some reason when I try to
> login as root via serial console it says 'login incorrect' when I
> enter 'root' as a user and press enter. It doesn't even ask any
> passwords before saying that. I tried enabling debug-tweaks and still
> the same. Can't login as a root.
> 
> I have another user that I can login just fine and with sudo I can
> also use root access. I just can't login as root.
> 
> I looked through /etc/passwd and /etc/shadow and they looked okay. Has
> something changed in Warrior regarding this? I tried googling, but
> didn't find anything.

Is there an /etc/securetty file and if so what does it contain?

Cheers
Paul

-- 

Paul Eggleton
Intel System Software Products

Re: [yocto] Root login not working with Warrior

[Paul Eggleton]

On Thursday, 16 January 2020 10:14:42 PM NZDT Paul Eggleton wrote:
> Hi Teemu
> 
> On Tuesday, 14 January 2020 4:37:29 AM NZDT Teemu K. wrote:
> > I have Yocto image that was originally made with Thud - version of
> > Yocto. It was working fine and I was able to login as root via serial
> > console.
> > 
> > Then I updated Yocto to Warrior and now for some reason when I try to
> > login as root via serial console it says 'login incorrect' when I
> > enter 'root' as a user and press enter. It doesn't even ask any
> > passwords before saying that. I tried enabling debug-tweaks and still
> > the same. Can't login as a root.
> > 
> > I have another user that I can login just fine and with sudo I can
> > also use root access. I just can't login as root.
> > 
> > I looked through /etc/passwd and /etc/shadow and they looked okay. Has
> > something changed in Warrior regarding this? I tried googling, but
> > didn't find anything.
> 
> Is there an /etc/securetty file and if so what does it contain?

Or perhaps more reasonably, does it contain the name of the device you are 
attempting to log in via?

Cheers
Paul


-- 

Paul Eggleton
Intel System Software Products