If I change the password for the root user is that going to automatically change the password for the user account?
I found this link for root:
WikiHow: How to Change the Root Password in Linux
How do I change the user account password?
When I install the Ubuntu, I set a short password(<4). Now I want to change the other short password by "passwd" or change passphrase on "Password and Keys" program, it needs a password >4 char.
On one particular machine I often need to run sudo commands every now and then.
I am fine with entering password on sudo in most of the cases.
However there are three sudo commands I want to run without entering password:
sudo rebootsudo shutdown -r nowsudo shutdown -P now
How can I exclude these commands from password protection to sudo?
Inspired by this question....
I am the sole person using my system with 12.04.
Every time I issue a sudo command; the system asks for the user password (which is good in its own way).
However I was thinking; without activating the root account; how can I execute the sudo commands which will not ask for user password to authenticate.
NOTE: I want to execute sudo command without authenticating via password; only when they are executed via terminal.
I don't want to remove this extra layer of security from other functions such a while using 'Ubuntu software center' or executing a bash script by drag-drop something.sh file to the terminal.
I'd like to allow SSH password authentication from only a certain subnet. I see the option to disallow it globally in /etc/ssh/sshd_config:
# Change to no to disable tunnelled clear text passwords
#PasswordAuthentication yes
Is there a way to apply this configuration to a select range of IP addresses?