![]() Please don’t hesitate to post your queries and feedback in below comments section. we hope you have learnt how to create a sudo user on ubuntu Linux from command line and desktop environment (GUI). To start using this user, logout and login with this user. Great, above window shows that sysops user is created as a sudo user (administrator). It will take us to the following window, click on unlock and enter your user’s password,Īfter entering the credentials, click on Add User option and specify the user details like full name, username, standard or administrator (sudo) and password. If you are not comfortable with command line and wants to create a new sudo user from GUI then refer the below steps.įrom the Activity, search users and click on user’s icon as show below, Creating new sudo user from Desktop Environment (GUI) After that interval, it will prompt to enter password again while executing sudo command. When we run the command with sudo first time then it will prompt you to enter user’s password and will save it for next 5 minutes. # su – sysopsĪs we can see above, sysops user is able to run admin commands by putting sudo in front of each command. To test sudo access, switch to sudo user and try to run some admin commands by placing sudo in front of command. # usermod -aG sudo > Testing Sudo User Access To add an existing user to sudo group, run Output of id command confirms that sysops user is created successfully, now add this user to sudo group using usermod command, # usermod -aG sudo sysops ![]() This command will prompt to set password of sysops user and other details as shown below, To create new sudo user, open the terminal and switch to root user and run following command, In this post, we have tested following commands on Ubuntu 22.04 LTS (Jammy Jellyfish). If we add any regular user to that sudo group then that user will have sudo admin rights. The user doesn't specifically need to exist in the container's /etc/passwd file.When we install Ubuntu Desktop or Ubuntu server then a group named ‘ sudo’ is created automatically. If file permissions really matter, you can specify the numeric host user ID to use when you launch the container. Ideally that's the end of the story: your code is built into your image and it stores all of its data somewhere external like a database, so it doesn't care about the host user space at all (there by default shouldn't be docker run -v or Docker Compose volumes: options). When you describe the default way to run the container, only then switch to the non-root user. This includes installing your application. Still in your Dockerfile, do almost everything as root. RUN adduser -system -group -no-create-home appuser It does not need a password, login shell, home directory, or any other details. In your Dockerfile, create some non-root user. The typical practice I'm used to works like this: The exception is when sharing files with the host using bind mounts, but there it's better to specify this detail when you start the container. ![]() Since your containers have some isolation from the host system, you don't generally need containers to have the same user names or user IDs as the host system. For a Debian AMI, the user name is admin. For a CentOS AMI, the user name is centos or ec2-user. The default user names are: For Amazon Linux 2022, Amazon Linux 2, or the Amazon Linux AMI, the user name is ec2-user. RUN apt-get update & apt-get install -y some-package The default user name for your EC2 instance is determined by the AMI that was specified when you launched the instance. In the context of your question, if you've already switched to some non-root user, and you need to run some administrative command, use USER to switch back to root. sudo is also hard to script, and it's very hard to usefully maintain a user password in Docker (writing a root-equivalent password in a plain-text file that can be easily retrieved isn't a security best practice). In Docker you almost never need sudo, for three reasons: it's trivial to switch users in most contexts you don't typically get interactive shells in containers (how do I get a directory listing from inside the cron daemon?) and if you can run any docker command at all you can very easily root the whole host. (How do I add a user to my PostgreSQL server with sudo privileges? How do I add a user to my Web browser?) If you ask this question about other processes, it doesn't really make sense. Generally you should think of a Docker container as a wrapper around a single process. ![]()
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