Question

plz EXPLAIN AND show me the screenshot how TO DO THESE!

Perform all of the following on your Linux instance.

• Create a new user named ava.
• Create a new user named charlie.
• Create a new system user named automation.
• Create a new group named marketing.
• Create a new group named sales.
• Add the user ava to the marketing group without removing the user from any other groups.
• Add the user charlie to the sales group without removing the user from any other groups.
• Change the hostname of the system to instance-UCID where UCID is your HCCC UCID. Note, HCCC UCIDs are the first part of your HCCC email address before the @ symbol.
• Create a system-level cron job to execute the whoami command as the root user at 05:56 on the 15th and the 28th day of the month during the months September and October.
• Create a system-level cron job to execute the date command as the root user at every Saturday at 12:30 only if that Saturday falls on the 1st to the 15th of any month.

For credit on this assignment, upload one or more screenshots showing all of the following.

• The output of getent passwd ava charlie automation.
• The output of getent group marketing sales.
• The output of hostnamectl.
• The output of cat /etc/crontab.

Answer 1

1. To create a new user in Linux, type the following command in the Linux terminal -

sudo useradd ava

This command adds ava as a user.

2,3. Similarly add users - charlie and automation

sudo useradd charlie

sudo useradd automation

4. To create a new group in Linux use the following command - sudo groupadd marketing

This command adds a new group named marketing in Linux.

5. Similarly add the sales group - sudo groupadd sales

6. To add a user to a new group we use the adduser command. To add ava to the marketing group, the command is- sudo adduser ava marketing

7. To add charlie to the sales group, the command is - sudo adduser charlie sales

8. We can change the hostname by hostnamectl command. Hostname as you can see in the above screenshots is wildbeast, which is written on the command prompt. It is also your computer's name. Here it is asked to change the hostname to instance-UCID. Considering UCID is 1234(change it as required), the command to change the hostname is - sudo hostnamectl set-hostname instance-1234

9. To create system level cron jobs edit the /etc/crontab file and store your corn tasks there.

Cron syntax can be seen by opening the /etc/crontab file. To execute whoami command as given in the instructions, the corn syntax is-

56 5 15,28 9,10 * root /usr/bin/whoami

Explanation - 56(minutes), 5(hours), 15,28(dates of month), 9,10(month-September and October), *(day of week,here any day is fine so *), root(which user should run this command), /usr/bin/whoami (Command location)

10. To run the date cron job as specified, use the following syntax-

30 12 1-15 * 6 root /usr/bin/date

Explanation - 30(mins), 12(hours), 1-15(command should only run between 1-15 of the month), *(any month), 6(Saturday), root(user name which runs the command), /usr/bin/date (location of command).

You can edit the crontab file to write these commands by - sudo nano /etc/crontab and writing these 2 lines at the end of the file

OUTPUTS-

1. The output of getent passwd ava charlie automation.

2. The output of getent group marketing sales.

3. The output of hostnamectl. (Hiding my personal info with red blur here)

4. The output of cat /etc/crontab.