[SOLVED] Unable to login at console with root on Debian 8

[FrankB]

I was baffled why I was not able to login to Debian 8 at console after an upgrade. I just kept on getting "Login incorrect" and auth.log showed:
pam_securetty(login:auth): access denied: tty '/dev/pts/0' is not secure !

Add 'pts/0' to your /etc/securetty file before you get locked out. Luckily I had a user with SU privileges and root through ssh still worked as well.

 

[Colin 't Hart]

I had this also in Proxmox 4.4 with Ubuntu 18.04 containers, but no longer had the problem under Proxmox 5.3 -- there /dev/tty1 is used instead.

 

[mattedj]

Or switch you console mode in you ct settings to 'console' instead of 'tty(default), it'll get you in