How do I disable su?

How do I disable su?

By disabling, I mean any of:

  1. Exploiting any system-specific means of restricting access to ‘su’ (such as the group ‘wheel’ trick for BSD, or the Linux equivalent).
  2. Remove it ( rm -f /bin/su ).
  3. Remove its execute permission bits ( chmod o-x /bin/su or chmod go-x /bin/su ).

How do I restrict sudo commands?

This can be done in the /etc/sudoers file. This line means that any user under the ‘sudo’ group has a permission to run all of the commands on the server. In order to restric the sudo group to a handfull of commands, you’ll need to edit that line. That’s it.

How do I stop sudo from changing root password?

If you want to stop sudoers from changing root’s password – or somebody else’s password – you cannot prevent that either; they can manually edit /etc/shadow as long as they have root privileges using sudo.

How do I get rid of sudo?

Best Answer:

  1. The sudo user can be removed.
  2. By executing the following command:
  3. sudo deluser.
  4. This will delete the user’s home directory and all files in it.
  5. As well as any directories under the user’s home directory.

What is sudo su?

sudo vs su Command The sudo command lets us use our account and password to execute system commands with root privileges, whereas the su command allows us to switch to a different user and execute one or more commands in the shell without logging out from our current session.

How do I change sudo permissions?

Steps to Add Sudo User on Ubuntu

  1. Step 1: Create New User. Log into the system with a root user or an account with sudo privileges.
  2. Step 2: Add User to Sudo Group. Most Linux systems, including Ubuntu, have a user group for sudo users.
  3. Step 3: Verify User Belongs to Sudo Group.
  4. Step 4: Verify Sudo Access.

How do I stop sudo all the time?

Two things you can do are: 1) Run sudo -s to stay root when you plan on entering multiple commands and don’t want to keep prefixing them with sudo. 2) You can configure your sudoers file to allow you to run sudo without having to enter your password.

How do I limit user commands in Linux?


  1. Create the restricted shell.
  2. Modify the target user for the shell as restricted shell.
  3. Create a directory under /home/localuser/ , e.g. programs.
  4. Now if you check, the user localuser can access all commands which he/she has allowed to execute.

How do I stop sudo every time?

How do I switch to su root?

To change user to root account, simply run “su” or “su –” without any arguments.

How do I come out of root?

2 Answers. From what I gather you’re simply trying to return to your user account after gaining access to root. in terminal. Or you can simply press CTRL + D .

How to limit root access with sudo?

Limiting root access with sudo, part 1 1 1) Respect the privacy of others. 2 2) Think before you type. More

What should I do if Sudo is not running on Linux?

If the /etc/sudoers file is saved with syntax errors, sudo will not run. If errors exist, save the file without the changes or re-edit it. The /etc/sudoers file consists of two important sections, the Alias section and the Privilege section.

What is the default DNS for Sudo?

The default is local2. Allows DNS Fully Qualified Domain Names, like, and short names, like techrepublic. This option will break sudo if DNS is operational on the system. When a user executes and is successfully authenticated, a ticket file named after the user is created in /var/run/sudo.

What will break sudo if DNS is operational on the system?

This option will break sudo if DNS is operational on the system. When a user executes and is successfully authenticated, a ticket file named after the user is created in /var/run/sudo. This ticket file is used to set the time remaining before the user must re-authenticate.