You need to create a user on your red hat enterprise linux system. what command should you use?
From the course: Setting Up a Red Hat Enterprise Linux Server Video is locked. “ - [Narrator] In this chapter, we'll create user accounts. We'll also modify and delete them. These are pretty common administrative tasks.
We'll also take a look at working with groups. First, we need to log in as root. Go ahead and enter your login credentials. We're gonna start by running the ID command to see user and group IDs. Type ID at the command line and hit enter. There's a subtle change in Redhat Enterprise Linux Version 7, in that the default rage for IDs is a bit different than in earlier releases. Before, the number rage for user ID or UID was 1 through 499. That was used for system users and higher values for normal
users. The default rage for system users is now 1 to 999. Now let's add a new user to the system. Type useradd at the command prompt. We're gonna go ahead and add an option here, dash m, this will create the home directory if it doesn't already exist. After the option, we're gonna add the argument of the new username. Before we go any further, let's go ahead… ContentsRed Hat Enterprise Linux CoreOS (RHCOS) represents the next generation of single-purpose container operating system technology by providing the quality standards of Red Hat Enterprise Linux (RHEL) with automated, remote upgrade features. RHCOS is supported only as a component of OpenShift Container Platform 4.8 for all OpenShift Container Platform machines. RHCOS is the only supported operating system for OpenShift Container Platform control plane, or master, machines. While RHCOS is the default operating system for all cluster machines, you can create compute machines, which are also known as worker machines, that use RHEL as their operating system. There are two general ways RHCOS is deployed in OpenShift Container Platform 4.8:
Key RHCOS featuresThe following list describes key features of the RHCOS operating system:
For RHCOS systems, the layout of the rpm-ostree file system has the following characteristics:
Choosing how to configure RHCOSRHCOS is designed to deploy on an OpenShift Container Platform cluster with a minimal amount of user configuration. In its most basic form, this consists of:
Because RHCOS systems in OpenShift Container Platform are designed to be fully managed from the OpenShift Container Platform cluster after that, directly changing an RHCOS machine is discouraged. Although limited direct access to RHCOS machines cluster can be accomplished for debugging purposes, you should not directly configure RHCOS systems. Instead, if you need to add or change features on your OpenShift Container Platform nodes, consider making changes in the following ways:
Here are examples of customizations you could do on day 1:
To accomplish these tasks, you can augment the openshift-install process to include additional objects such as MachineConfig objects. Those procedures that result in creating machine configs can be passed to the Machine Config Operator after the cluster is up.
Choosing how to deploy RHCOSDifferences between RHCOS installations for OpenShift Container Platform are based on whether you are deploying on an infrastructure provisioned by the installer or by the user:
The Ignition facility runs only when the RHCOS system is first set up. After that, Ignition configs can be supplied later using the machine config. About IgnitionIgnition is the utility that is used by RHCOS to manipulate disks during initial configuration. It completes common disk tasks, including partitioning disks, formatting partitions, writing files, and configuring users. On first boot, Ignition reads its configuration from the installation media or the location that you specify and applies the configuration to the machines. Whether you are installing your cluster or adding machines to it, Ignition always performs the initial configuration of the OpenShift Container Platform cluster machines. Most of the actual system setup happens on each machine itself. For each machine, Ignition takes the RHCOS image and boots the RHCOS kernel. Options on the kernel command line identify the type of deployment and the location of the Ignition-enabled initial RAM disk (initramfs). How Ignition worksTo create machines by using Ignition, you need Ignition config files. The OpenShift Container Platform installation program creates the Ignition config files that you need to deploy your cluster. These files are based on the information that you provide to the installation program directly or through an install-config.yaml file. The way that Ignition configures machines is similar to how tools like cloud-init or Linux Anaconda kickstart configure systems, but with some important differences:
The Ignition sequenceThe Ignition process for an RHCOS machine in an OpenShift Container Platform cluster involves the following steps:
At the end of this process, the machine is ready to join the cluster and does not require a reboot. How users can be created in Redhat Linux?How to add a new user in Redhat 9.0. To add a user and set up the directories you want that user to have, use the useradd command. ... . EXAMPLE: /usr/sbin/useradd yourname will create the user yourname, and make the directory /home/yourname.. Set the password for the new user by running passwd.. What is the command to create user in Linux server?How to Add a User to Linux. Log in as root.. Use the command useradd "name of the user" (for example, useradd roman). Use su plus the name of the user you just added to log on.. "Exit" will log you out.. How do I create a user account in Linux?How to Create a New User in Linux. To create a new user account, invoke the useradd command followed by the name of the user. When executed without any option, useradd creates a new user account using the default settings specified in the /etc/default/useradd file.
Which of the Linux command is used to manage users?3 basic Linux user management commands every sysadmin should know. How to use the useradd, usermod, and userdel commands is essential knowledge for Linux administrators.
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