Why the non-root user can't login with a key in putty?
21206
How to make password-less login work
8605
How to run a specific program as root without a password prompt?
77566
How to set root password to null
66470
Login with SSH authorized key with changed SSH port
117627
Ssh login hook?
67038
I can use sudo but I can't use su due to a password Authentication failure, shouldn't both be the same password?
2634
Key based SSH login that requires both key AND password
9326
How to enable root login?
134026
setuid root does not work
135403
How do I add SSH Keys to authorized_keys file?
19521
Why is it bad to log in as root?
109370
Password not working in Graphical Applications (gksu)? Works with sudo
45657
I Can't login as root with su command, but I can with SSH
56616
Network error: Connection refused putty
78197
How to set user passwords using passwd without a prompt?
130902
Can't do SSH public key login under encrypted home
124795
sudo does not ask for password