Bypassing root authentication by pressing the ENTER key for 70 seconds
92818
Test whether Ubuntu is vulnerable to (CVE-2016-4484)
23258
How to prevent system applications (like the Software Center) from asking for password?
135243
Why can't I login on the remote computer without a password after using SSH-KEYGEN command?
103326
Why is there a delay when entering a wrong password?
136991
How to pass the password to su/sudo/ssh without overriding the TTY?
18871
How often is the password asked for sudo commands? Where can I set it up?
101530
How do I set up SSH so I don't have to type my password?
136007
How to enable root login again after changing password?
19521
Why is it bad to log in as root?
145864
How do I get Ubuntu to ask me for a password at login again?
148398
Disable SSH login via password on a per-user basis?
92318
How to run sudo command with no password?
97481
How do I disable remote SSH login as root from a server?
61493
How to stop my machine asking for multiple passwords when I log in?
107167
How can I run ssh-add automatically, without a password prompt?
48372
How to speed my too-slow ssh login?
100535
How can we change root password?