Which of the following server roles would MOST likely be found in a PXE boot environment?

The following tools help maintain consistency across different systems in an infrastructure:
SUSE Manager
Red Hat Satellite
Spacewalk
If a system file is changed, the tools roll back the file to a predefined configuration.
Which of the following concepts BEST describes this behavior?

An administrator is reviewing updates in the master online Git repository and notices a file named .htaccess.
The file contains passwords and should only be in the administrator's local repository, not the online one.
Which of the following would prevent this file from appearing online in the future?

A user wants to list the lines of a log, adding a correlative number at the beginning of each line separated by a set of dashes from the actual message. Which of the following scripts will complete this task?

A systems administrator wants to disable the Linux Kernel WatchDog Timer Driver for security purposes.
Which of the following will accomplish this task?