Task 4. Delete a userA year later, researcher9, decided to leave the company. In this task, you must remove them from the system.Run a command to delete researcher9 from the system:This command will output the following message:This is expected.Note: When you create a new user in Linux, a group with the same name as the user is automatically created and the user is the only member of that group. After removing users, it is good practice to clean up any such empty groups that may remain behind.Run the following command to delete the researcher9 group that is no longer required:Click Check my progress to verify that you have completed this task correctly.Delete a user

Task 3. Add the user to a secondary groupA couple of months later, this employee's role at the organization has changed, and they are working in both the Research and the Sales departments.In this task, you must add researcher9 to a secondary group (sales_team). Their primary group is still research_team.Use the usermod command with the -a and -G options to add researcher9 to the sales_team group as a secondary group.Note: Options for Linux commands are case-sensitive, so make sure you use a lowercase -a and an uppercase -G.Click Check my progress to verify that you have completed this task correctly.

A new employee has joined the Research department. In this task, you must add them to the system. The username assigned to them is researcher9.Write a command to add a user called researcher9 to the system.Next, you need to add the new user to the research_team group.Use the usermod command and -g option to add researcher9 to the research_team group as their primary group.

How do you delete the users record with id = 89 in this table?+-------+-------------------------------------------------------------------------------------------------------------------------------+| Table | Create Table |+-------+-------------------------------------------------------------------------------------------------------------------------------+| users | CREATE TABLE `users` ( `id` int(11) DEFAULT NULL, `name` varchar(256) DEFAULT NULL, `age` int(11) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=latin1 |+-------+-------------------------------------------------------------------------------------------------------------------------------+DELETE users WHERE id = 89;DELETE FROM users WHERE id = 89;DELETE FROM users;DELETE FROM users WHERE id IS EQUAL TO 89;

You want to delete a group called "testers," but you want to preserve any files owned by this group. Which command should you use?1.0 Markssudo delgroup -p testerssudo groupdel -r testerssudo groupdel testerssudo delgroup --preserve-files testerssudo delgroup -f testers

You want to delete a group called "testers," but you want to preserve any files owned by this group. Which command should you use?1.0 Markssudo delgroup --preserve-files testerssudo groupdel testerssudo groupdel -r testerssudo delgroup -f testerssudo delgroup -p testers