As 'Linux' is actually the Linux Kernel and a bunch of other tools packaged together as a distro, this will depend on the distro you use. For example, Red Hat Linux uses a file called ks.cfg (known as kickstart) which contains information for it's installer system called Anaconda.
Kickstart is such a tool you can use to automate installations.
A package manager is a utility to install remove, upgrade, and track the dependencies of software in Linux.
No, it's an operating system kernel.
Linux use this popular utility called ethtool to allow users to view and change NIC settings
find / -name "utility*" -type f Quotes prevent shell globbing.
KUser
type on a Linux terminal: ifconfig Note: it is ipconfig in Windows.
The cat utility is designed to join files together. It is also sometimes used to read files through a terminal.
TAR
Click yes
Grep
http://knoppix.net/linux-certification.php - here you can find exactly what you search and you can learn everything about Linux certification.