I have added a user test with root permissions. In my sshd_config file I have kept permitrootlogin as No, to block ssh for root. I am not able to do ssh for root which works fine, but the issue is i am not able to login test user also via ssh.
How can I fix this issue?
/etc/passwd extracts:
root:x:0:0:root:/root:/bin/sh
test:x:0:0::/home/test:/usr/sbin/myshell
You can resolve this issue by creating a normal user for login, and then using a local escalation tool (su, sudo, doas, pkexec...) to gain root privilege.
OpenSSH (like many other tools) does not restrict root based on the string "root", but rather on the privileged UID zero. Since you have set the UID of your new user to zero, it will fail to login in exactly those situations where root cannot login.
For one example, from userauth_finish() in auth2.c in the OpenSSH source:
/* Special handling for root */
if (authenticated && authctxt->pw->pw_uid == 0 &&
!auth_root_allowed(ssh, method))
authenticated = 0;
/etc/shadowfor usertest? Also, what error message do you get?PermitRootLogintowithout-passwordinstead ofnoand use public key auth to login as root. Or just set a strong password. What are you supposed to achive by creating atestalias forroot?userdel(1)from the shadow package will refuse the delete yourtestuser. Havinggetpwuid(pw->pw_uid)return a different entry thanpwis certainly very confusing.