non-root users can run passwd command as root, why can't they change password of root?
33844
How do real and effective user IDs work?
143096
Sudoers NOPASSWD for single executable but allowing others
70191
How to specify password in ssh command
124252
chpasswd apply changes in the chroot directory
40667
How do I gain root privileges?
101117
Accessing SSH_AUTH_SOCK from another non-root user
121061
How to change the mysql root password
124795
sudo does not ask for password
149274
passwd pauses after bad password has been entered
136007
How to enable root login again after changing password?
100535
How can we change root password?
135331
I changed /etc/sudoers, and now I can't run as sudo
54482
Why is there no option to login as root?
78197
How to set user passwords using passwd without a prompt?
71306
Which user's password does `sudo` asks for?
8605
How to run a specific program as root without a password prompt?
140654
Giving access of a set of commands to a non-root user without sudo