![]() ![]() Finally, open a new terminal window and run a command that requires root privileges, such as sudo apt-get update.It is important to add this line at the end of the file, so that the other permissions do not override this directive, since they are processed in order. If you have any sort of syntax problem, visudo will warn you and you can abort the change or open the file for editing again. Replace username with your account username, of course. All users by default are allowed to access the su command. ![]() It also allows you to switch to the root account (if run without any arguments) or another specified user account. Ubuntu is designed to work without a root password. The su command is a special Linux command that allows you to run a command as another user and group. At the end of the /etc/sudoers file add this line: Zignd: No, sudo requires your password, not the root password.You should never edit /etc/sudoers with a regular text editor, such as Vim or nano, because they do not validate the syntax like the visudo editor. From the terminal it would be something like this: rootcs01: su foo foocs01:/root cd foocs01: ls. Open the /etc/sudoers file (as root, of course!) by running: I need to login in ssh to a server, do 'su username' (without password) to execute some commands as that user (that have no direct login in ssh).Here’s a quick fix that removes the requirement to enter you password for sudo. So, while it defies all security principles, echo 'password' sudo -S su. The password must be followed by a newline character. However, it can also be inconvenient to have to enter your password every time that you use sudo. Terminal Super User Mode still required password - but I guess it is not using sudo but su So I made myself a new root terminal kdesu konsole run as. 2 Answers Sorted by: 15 From man sudo: -S The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device. how to configure the system so that an unprivileged user can authenticate as another unprivileged user without being prompted for a password.That step requires root access, of course (and the OP does have it). I apologize if this isn't what you were hoping for.You probably know that in Ubuntu/Debian, you should not run as the root user, but should use the sudo command instead to run commands that require root privileges. SridharSarnobat The sudo visudo part is just a clarification on how to (safely) edit /etc/sudoers, i.e. If you could do it, so could anyone else, and that's a huge security threat. The sudo command offers a way to grant partial or full access to the root account without the users needing the root password. Someone who doesn't know what they're doing might set it up so you could, but that's Bad with a capital B). No, it's impossible (on a well-setup computer. Hi security breach, my name is gurk! (That's the sound I imagine an sentient AI would make upon being attacked by a sentient virus). x would gain root privileges, despite the admin deliberately (maybe the admin knows x would trust Internet comments that are a threat to security - though such an admin would be smart enough to make sure passwords weren't 1234, this is a hypothetical situation) not giving them to x. x runs su y and then runs sudo su and enters 1234. y has sudo permissions, and thinking "no one will ever guess this," set his password to 1234. Here's a new scenario: user x doesn't have sudo permissions, but can run su y without y's password. This procedure I have to do in all the servers. ![]() If you successfully connected and are viewing the psql. This is obviously undesirable, and is an argument for ensuring sudo is configured safely. To Run the Restart service I need to switch user to suser using below command: ( I need this command without password prompt) sudo su - suser The above command prompts for password where I will provide my password to restart services. Thus, to add a password, we must first login and connect as the postgres user. If a runs sudo su b and enters the password correctly, they have access to account b without any password but their own. Let's say account a has been compromised (it's password was somehow magically hacked through a live disk for example). ![]() If the account has sudo permissions, your desired situation becomes possible. If that account has sudo permissions, every account is compromised. If someone gains access to one account, that account's data is compromised. AFAIK, it's not possible for compelling security reasons (unless you have sudo privileges that allow it, which is a risk in and of itself). ![]()
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