QUESTION FIVE (20 MARKS) a) User management in Linux is done by using Linux administration commands write a command for each of the following user management task (5 marks) i) Adds a user ii) Disable a user iii) Delete a user iv) Add a user to a user group v) Gives information on all logged in user b) State FIVE features of Linux operating systems (5 marks) c) As a system administrator of an IT firm, describe how you would create a Shell Script in Linux environment (5 marks) d) Using appropriate commands show how you can change permissions under Linux

a) User management in Linux is done by using Linux administration commands. Here are the commands for each of the following user management tasks:<br /><br />i) Adds a user: `sudo useradd username`<br />ii) Disable a user: `sudo usermod -S username`<br />iii) Delete a user: `sudo userdel username`<br />iv) Add a user to a user group: `sudo usermod -aG groupname username`<br />v) Gives information on all logged in user: `who | grep 'name'`<br /><br />b) Five features of Linux operating systems are:<br />1. Open-source: Linux is an open-source operating system, which means that its source code is freely available for anyone to view, modify, and distribute.<br />2. Security: Linux is known for its strong security features, such as built-in firewall, secure network protocols, and regular security updates.<br />3. Customizability: Linux allows users to customize their operating system according to their needs. Users can choose from a variety of desktop environments, window managers, and themes.<br />4. Stability: Linux is known for its stability and reliability. It can run on a wide range of hardware platforms and can handle multiple tasks simultaneously without crashing.<br />5. Community support: Linux has a large and active community of users and developers. This means that there are many resources available for Linux users, such as documentation, forums, and support groups.<br /><br />c) As a system administrator of an IT firm, to create a Shell Script in Linux environment, I would follow these steps:<br />1. Open a text editor, such as nano or vim, and create a new file with a.sh extension.<br />2. Add the necessary commands to the file, using the syntax of the shell scripting language.<br />3. Save the file and make it executable using the `chmod` command.<br />4. Run the script by typing `./scriptname.sh` in the terminal.<br /><br />d) To change permissions under Linux, you can use the `chmod` command. Here are some examples:<br /><br />1. To change the permissions of a file: `chmod permissions filename`<br />2. To change the permissions of a directory: `chmod permissions directoryname`<br />3. To change the ownership of a file: `sudo chown newowner filename`<br />4. To change the group ownership of a file: `sudo chgrp newgroup filename`<br />5. To change the permissions of a file for a specific user: `sudo chmod permissions username:filename`