A system with SysV-init has a service installed called apache2. Which file controls the start and stop of this service and is referenced by the various runlevel directories?

Which of the following is a side effect of extensive usage of swap space?

A new kernel version needs to be compiled to use a new feature. If the old kernel configuration file is available, which make target creates a configuration file for the new kernel based on the configuration of the old kernel?

What command must you type as root to have the system re-scan the directories on the library path to enable programs to find dynamic libraries in these directories?

In which directory tree are files modified when changing kernel parameters using the command sysctl?