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I'm logging in as root to an embedded system running Linux, on the console, as root. After issuing the "Last Login" line, the console hangs. It echoes any characters I type but otherwise I get no response. If I hit ^C, I'm back to the login prompt, which implies that the login session has not yet started.

Any clues to what might be going wrong here? I believe that rebooting will recover, and if not, re-imaging via USB is an issue, but I want to get to the root of what's happening here to fix the underlying problem.

The system runs bash/busybox for sessions, if that helps. I'm not sure what linux distro; it's obfuscated by the manufacturer.

The "Last login" timestamp is being updated each time I try to log in.

In this case, networking is not configured so I can't try ssh.

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    Look at your ~/.bashrc, ~/.bash_profile, /etc/profile, ... – Ipor Sircer Nov 27 '18 at 14:41
  • @IporSircer Yeah, the "usual suspects". Since I can't log in, I can't check these, and it's unlikely someone changed them but will do after reboot. However, on another identical system, if I put "sleep 60" in these, login, and ^C, I get to the shell, not back to the login prompt. So I think it's something else. – Jeff Learman Nov 27 '18 at 17:04
  • Also, control-Z doesn't put the process in the background, as it does when there's a delay in a profile. It just echoes as ^Z. – Jeff Learman Nov 27 '18 at 18:41

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