Chapter 7, Problem 7RQ

Which of the following statements is true? (Choose all that apply.)a. If /etc/at.allow exists, only users listed in it can use the at command.b. If /etc/cron.allow exists, only users listed in it can use the cron command.c. If /etc/cron.deny exists and /etc/cron.allow does not exist, any user not listed in/etc/cron.deny can use the cron command.d. If /etc/cron.allow and /etc/cron.deny exist, only users listed in the former can use thecron command, and any users listed in the latter are denied access to the croncommand.e. If a user is listed in both /etc/cron.allow and /etc/cron.deny, then /etc/cron.denytakes precedence and the user cannot access the crontab command.

Which of the following commands would display all files that start with the characters song and end in a number 100-599? A. ls song???   B. ls song[100-599]   C. ls song[0-9][0-9][0-9]   D. ls song[1-5][0-9][0-9]

You have set up a user group named Accounting and have put all employees in the Accounting department in this group, which has been given permission to use the Financial folder on a file server. You are now asked to create a subfolder under Financial named Payroll. Megan, the payroll officer, is the only employee in the Accounting department allowed to access this folder. What is the best way to configure the new share? a. Assign Megan read/write permissions to the Payroll folder, and explain to your boss that it is not a best practice to give only one employee access to an important folder. b. Assign Megan read/write permissions to the Payroll folder. c. Create a new user group named Payroll, put Megan in the group, and assign the group read/write permissions to the Payroll folder. d. Ask your boss to allow you to put the folder outside of the Financial folder so you can assign a new user group read/write permissions to this folder that will not conflict with the Accounting user group.