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#SUDO SU WITHOUT PASSWORD HOW TO#
#SUDO SU WITHOUT PASSWORD PASSWORD#

Introduction Not all Linux distributions force a root or other superuser password to be set during installation.

#SUDO SU WITHOUT PASSWORD HOW TO#

Open a new terminal and run sudo whatever, then close it and open another new terminal and run sudo whatever, you will see that sudo asks for password every time. How to Change root Password via sudo Without su Last updated: MaWritten by: Hiks Gerganov Administration passwd We're looking for a DevOps Lead with bash, LAMP/LEMP and CI/CD stack experience: Read More 1. The scenario you are experiencing is caused by the users cached credentials for sudo, which allow sudo to maintain a session and any further sudo command will not prompt for passwords. In this case, the user (for example aaronk) who will switch to another user account (for example postgres) should be in the sudoers file or in the sudo group to be able to invoke the sudo command.

The sed command disables the #includedir directive that would allow any files in subdirectories to override these inline updates.I want to run the command in user mode sudo but the terminal don't You can also su to another user without requiring a password by making some changes in the sudoers file.

The sed command does inline updates to the /etc/sudoers file to allow foo and root users passwordless access to the sudo command.

The passwords for both foo and root are deleted.

The home directory is set to /home/foo.

The user foo is added to the both the foo and sudo group.

Sed -i /etc/sudoers -re 's/^#includedir.*/# Removed the #include directive! #"/g' & \Įcho "Customized the sudoers file for passwordless access!" & \Įcho "foo ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers & \Įcho "root ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers & \Įcho "foo user:" su foo -c 'whoami & id' & \Įcho "root user:" su root -c 'whoami & id' Sed -i /etc/sudoers -re 's/^root.*/root ALL=(ALL:ALL) NOPASSWD: ALL/g' & \ Edit the file and make it a script that prints your password: /bin/sh printf 's ' 'yourpassword' Now you can do this: SUDOASKPASS'./pass' sudo -A su - someuser Note: in this case you provide password for sudo (not for su) use the one sudo wants. Sed -i /etc/sudoers -re 's/^%sudo.*/%sudo ALL=(ALL:ALL) NOPASSWD: ALL/g' & \ Useradd -U foo -m -s /bin/bash -p foo -G sudo & passwd -d foo & passwd -d root & \ This is how I've implemented the non-root, passwordless user in an ephemeral Docker Image for use in a CICD pipeline with the base image of ubuntu:18.04: RUN \

It looks like this: #includedir /etc/sudoers.d This is a sneaky little directive, as it appears to be a commented line upon first glance. Note: As mentioned, you may need to use adm as your admin group name, depending on which version of Ubuntu is being used.Īs I was researching this, I realized that there's a line in the /etc/sudoers file that is not a comment, but a directive that makes any file or folder under the directory /etc/sudoers/* override the contents of /etc/sudoers. You can also add the default AWS ubuntu user to the admin group via this command: sudo usermod ubuntu -g admin Which means: whenever user-a executes sudo -u user-b (or any other variant), let him go without asking for password. (on older versions of ubuntu, you may need to): sudo service sudo restartĮdit: You may have to add the admin group as I don't think it exists by default. Open /etc/sudoers.d/custom and write the following: user-a ALL (user-b:user-b) NOPASSWD:ALL. Then for every user that needs sudo access WITH a password: sudo adduser sudoĪnd for every user that needs sudo access WITH NO password: sudo adduser admin # See sudoers(5) for more information on "#include" directives:

# Members of the admin group may gain root privileges then for every user that needs sudo access WITH a password: sudo adduser sudo and for every user that needs sudo access WITH NO password: sudo adduser admin (on older versions of ubuntu, you may need to): sudo service sudo restart And thats it Edit: You may have to add the admin group as I dont think it exists by default.

# Allow members of group sudo to execute any command # See the man page for details on how to write a sudoers file.ĭefaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" # Please consider adding local content in /etc/sudoers.d/ instead of You should now have this: # This file MUST be edited with the 'visudo' command as root. To this line: # Members of the admin group may gain root privilegesĪnd move it under this line: # Allow members of group sudo to execute any command I found that the most straight forward thing to do, in order to easily replicate this behavior across multiple servers, was the following: sudo visudoĬhange this line: # Members of the admin group may gain root privileges