Which two of the following Class B IPv4 networks are reserved by IANA for private address assignment and private routing?
On a system using shadowed passwords, the correct permissions for /etc/passwd are _____ and the correct permission for /etc/shadow are _____.
You have modified user bob’s login information. In the passwd file, you changed /bin/bash to /bin/false. What effect will this have on user bob?
You have a script called logout-users which will log out inactive users every hour between the hours of 6 p.m and 7 a.m., Monday through Friday.