Title Linux Chapter V.pdf ✅

Chapter V: User Management 1. Creating user accounts 2. Setting user defaults 3. Providing support to users 4. Modifying accounts 5. Deleting user accounts 6. Checking Disk quotas 7. Sending mail to all users
Creating a User Account  A user is an entity, in a Linux operating system, that can manipulate files and perform several other operations. Each user is assigned an ID that is unique for each user in the operating system.  Linux, like other UNIX-based systems, was intended for use by more than one person at a time.  Multiuser features enable many people to have accounts on a single Linux system with their data kept secure from others. Multitasking enables many people to run many programs on the computer at the same time, with each person able to run more than one program.  Sophisticated networking protocols and applications make it possible for a Linux system to extend its capabilities to network users and computers around the world. The person assigned to manage all of a Linux system’s resources is called the system administrator.  After installation of the operating system, the ID 0 is assigned to the root user and the IDs 1 to 999 (both inclusive) are assigned to the system users and hence the ids for local user begins from 1000 onwards.  In a single directory, we can create 60,000 users.  During the time of installation Linux system, it allow creation of additional user account. Root account is always created in all Linux Destro while in some it might be deactivated.  As root users can make any changes so we should avoid using root account for day to day task.  There are two ways to create new user account: GUI or CLI.
Using Graphical Administration Tools  Cockpit is the best browser-based Linux system administration tool.  It brings together a range of Linux administrative activities into one interface and taps into a diverse set of Linux APIs using cockpit-bridge.  Getting started with Cockpit is as simple as enabling the cockpit socket and pointing a web browser at the Cockpit service. Because of Cockpit’s plug-in design, there are new tools being created all the time that you can add to your system’s Cockpit interface.
How to install cockpit  1. If Cockpit is not already installed, do the following:  # dnf install cockpit –y  # yum install cockpit -y  2. Log in as root user, and enable the Cockpit socket:  # systemctl enable --now cockpit.socket  3. Open your web browser to port 9090 on the system where you just enabled Cockpit.  https://host1.example.com:9090/  https://127.0.0.1:9090/  4. Assuming you didn’t replace the self-signed certificate for Cockpit, you are warned that the connection is not safe. To accept it anyway, and depending on your browser, you must select Advanced and agree to an exception to allow the browser to use the Cockpit service.  5. Enter your username and password. Use the root user or a user with sudo privileges if you want to change your system configuration. A regular user can see but not change most settings.  6. Begin using Cockpit. The Cockpit dashboard contains a good set of features by  default (you can add more later) on RHEL and Fedora systems.