Special File Types
Determining Unix Version
essential man Options
man Default Path
File Attributes Permissions
Manipulating Groups Owners
Basic Access Permissions
Numeric Access Codes
Setting Default Permissions
Additional Permission Bits
Determining File Types
Finding Files Command
Using xargs with find
Editing | Controlling Access Crontab - Exercise
Using crontab on Linux
Use the crontab command to schedule a system shutdown.
This is a Java applet
This exercise uses a Java applet to simulate a UNIX command line and allows you to practice entering commands. If you do not have Java active in your browser or are behind a firewall that does not allow Java applets, you will not be able to complete this exercise. If you do not see the applet below, click the
button to view the exercise solution and continue with the course.
This exercise is not scored. When you have completed the exercise, click the OK, I'm Done button to continue with the course.
Taking advantage of periodic processes is vital to effective system management with UNIX. In this exercise, you will use
to schedule a system shutdown. Before you can use
, you must first assume root privileges. Then, you view the contents of a file that will be the
entry source, and finally you will use
. Start the simulation below and work through the situation presented.