[SOLVED] Can't login to Ubuntu 18.04 container created from supplied template

[Colin 't Hart]

Hi,

I created an Ubuntu 18.04 container under Proxmox 4.4 from the supplied template. Didn't supply an SSH key, just a password.

But when I try to login on the console I type:

root <enter>

and then shortly after it says

Incorrect login

There's never a prompt for the password.

How do I even begin to debug this problem?

Logging in as a non-root user works fine. It also works fine on other 18.04 containers under Proxmox 5.3


And: is this the correct place to report issues with the supplied templates?

Thanks,

Colin

 

[Colin 't Hart]

I debugged this by looking in /var/log/auth.log.

The unsuccessful logins under Proxmox 4.4 looked like

Feb 28 10:19:56 host1 login[19577]: pam_securetty(login:auth): access denied: tty '/dev/pts/0' is not secure !
Feb 28 10:19:59 host1 login[19577]: FAILED LOGIN (1) on '/dev/pts/0' FOR 'root', Authentication failure

while the successful logins under Proxmox 5.3 looked like (ignore that middle line)

Feb 28 10:37:37 host2 login[3519]: pam_unix(login:session): session opened for user root by LOGIN(uid=0)
Feb 28 10:37:37 host2 login[3519]: pam_systemd(login:session): Failed to create session: Seat has no VTs but VT number not 0
Feb 28 10:37:37 host2 login[3557]: ROOT LOGIN on '/dev/tty1'

Something changed in Proxmox 5.3 so that the virtual console is now on /dev/tty1 rather than /dev/pts/0 under Proxmox 4.4

I have solved this by adding

pts/0

to /etc/securetty. I'm not sure if this is introducing a security hole though. I hope we can upgrade our Proxmox 4.4 nodes soon.

 

[grahambo]

I debugged this by looking in /var/log/auth.log.

The unsuccessful logins under Proxmox 4.4 looked like

Feb 28 10:19:56 host1 login[19577]: pam_securetty(login:auth): access denied: tty '/dev/pts/0' is not secure !
Feb 28 10:19:59 host1 login[19577]: FAILED LOGIN (1) on '/dev/pts/0' FOR 'root', Authentication failure

while the successful logins under Proxmox 5.3 looked like (ignore that middle line)

Feb 28 10:37:37 host2 login[3519]: pam_unix(login:session): session opened for user root by LOGIN(uid=0)
Feb 28 10:37:37 host2 login[3519]: pam_systemd(login:session): Failed to create session: Seat has no VTs but VT number not 0
Feb 28 10:37:37 host2 login[3557]: ROOT LOGIN on '/dev/tty1'

Something changed in Proxmox 5.3 so that the virtual console is now on /dev/tty1 rather than /dev/pts/0 under Proxmox 4.4

I have solved this by adding

pts/0

to /etc/securetty. I'm not sure if this is introducing a security hole though. I hope we can upgrade our Proxmox 4.4 nodes soon.

Worked perfectly. Thanks