Linux - Cannot login from remote console but can access via ssh

Linux - Cannot login from remote console but can access via ssh

 
If you are not able to access your Linux machine through it's remote console, you can give the below solution a try.

Symptom :
Not able to login to a Linux machine via remote console despict login credential used is valid.
Login via ssh is successful using the same login credential.

Troubleshooting Procedure:

1.  Login via ssh and monitor /var/log/secure live.
=====================================================================
#tail -f /var/log/secure
=====================================================================

2. Try to login from remote console while monitoring /var/log/secure for error.

3. Check if you find errors such as below.
=====================================================================
Mar  1 09:24:27 linuxmachine login: PAM unable to dlopen(/lib/security/pam_limits.so)
Mar  1 09:24:27 linuxmachine login: PAM [error: /lib/security/pam_limits.so: wrong ELF class: ELFCLASS32]
Mar  1 09:24:27 linuxmachine login: PAM adding faulty module: /lib/security/pam_limits.so
=====================================================================

4. If you find errors such as above, most likely your /etc/pam.d/login file is pointing to a faulty module. Check file /etc/pam.d/login for line below.
=====================================================================
session    required   /lib/security/pam_limits.so
=====================================================================

5. If you found it, try to replace the line with the below.
=====================================================================
session    required   /lib64/security/pam_limits.so
=====================================================================

6. Once done, try to login via remote console. If it is still not working, there might be other issue causing it. You will need to troubleshoot further. Check /var/log/secure for hint.
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