![]() ![]() Subscribe to TechRepublicâs How To Make Tech Work on YouTube for all the latest tech advice for business pros from Jack Wallen. Use this simple method to install Docker, and youâll be up and running in no time. You can now pull your first image and deploy your first container.Äocker doesnât have to be a challenge from the jump. Log out and log back in, and Docker is ready to go. The last thing you must do is add your user to the Docker group with the command sudo usermod -aG docker $USER.This will install all of the necessary dependencies as well as the Docker runtime engine on your machine. Next, give the new script executable permissions with chmod u+x install-docker.sh.Log into your Linux machine, and download the required script with the command curl -fsSL -o install-docker.sh.How do you pull this off? Let me show you. This process should work on most Linux distributions, but you will need a user with sudo privileges. Fortunately, thereâs a simple script you can use to install the Docker engine, and it only requires a few simple commands. If youâre not familiar with the operating system, it can be daunting to type all of those commands. Hopefully, you have got everything you need.If youâre anxious to start your journey with Docker, you might not want to spend the time getting the runtime engine ready to go on Linux. In this article, I have tried to provide a comprehensive view of sudo. Learning â what is sudo in Linuxâ is very important for any type of user. But in this case, it isnât prompting for any password even though I am using sudo. The good thing here is that you can use auto-completion. Suppose you want to install mplayer, you can simply use the command below: sudo apt install mplayer. If you can remember, it was asking for a password back then. Just replace the with the desired package.In Example 1, I have updated the system as well. â· Type the command below in the Terminal: sudo -n apt-get update Now to run a command without password, do the following: However, the â -nâ option gives a way to run commands without a password. ![]() When you use â sudoâ, you are prompted for a password. What is the meaning of the command sudo apt-get install sudo apt-get install command is used to download the latest version of your desired application from an online software repository pointed to by your sources.list configuration file and and install that application on your Linux machine. In the output, â (ALL : ALL) ALLâ denotes that user â walidâ have permissions to execute all commands. sudo snap remove packagename But what if you donât like Snap and want to delete not just the applications but also the Snap packaging support In this tutorial, youâll learn to: Remove Snap applications Delete Snap entirely from Ubuntu and other distributions Letâs see it in detail. In my case, the user â walidâ is also the root user. â· Copy the following command in the Terminal and hit ENTER: sudo -l ![]() ⶠPress CTRL + ALT + T, to open an Ubuntu Terminal. To list the permissions and privileges of a user, do the following: If you want to check whether you have root privileges or not, you can use the â -lâ option of the sudo command. Example 3: List the Permissions and Privileges You can do anything you want but make sure that the user has proper permissions. Here I have listed the contents of the â /varâ directory. â¹ Now find the ENTER key from your keyboard and hit it. â· Write the following command in the Terminal and press ENTER: sudo -u jim ls /var Now to execute a command as a different user, follow the steps below: I can do that by using the â -uâ option of command sudo. However, my system has another user named â jimâ and I want to execute a command as â jimâ. For instance, my current user name is â walidâ. Now I will execute a command with the privileges of a different user instead of current user. Example 2: Execute a Command as a Different User And as you can see, the system is updating successfully. In the output, I have used sudo to take advantage of root privileges. The â apt-get updateâ command updates the local package database with information of latest software packages and it wonât work without proper privileges and permissions. ⸠Provide the password to access root privileges. â· Insert the following command in the command prompt and hit ENTER: sudo apt-get update Now to update your system using sudo, do the following: As updating a system is a sensitive task, only root user has this privilege. In this example, I will update the system. Example 1: Update the system using âsudoâ These examples will help you understand the concept better. Here, I will show you a few examples of sudo command in Linux. -e, edits one or multiple files instead of executing commands.-r, ârole, runs commands with SELinux security context.-b, âbackground, runs commands in the background.-n, ânon-interactive, doesnât prompt for user password.-l, âlist, shows permissions and privileges of a user.-u, is used to execute commands as a different user. ![]()
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