Sec. 9: Processes and Process Data

The _____________ maintains a database of information about installed packages.

• Kernel

• Shell script

• Package software

Answer explanation

The package software keeps track of all software installed and their dependencies.

A package system can be installed directly from the internet.

• True

• False

Answer explanation

False, the package system is installed as part of the Linux distro by default, but additional package systems can be installed using the default package system, too.

The ________ is responsible for managing every other piece of software on a running Linux computer.

• Package file

• Host

• Kernel

Answer explanation

The kernel is a program that constitutes the central core of a computer operating system. It has complete control over everything that occurs in the system.

The process that launched a given process is called its ________.

• Parent

• Host

• Children

Answer explanation

In computing, a parent process is a process that has created one or more child processes.

Processes consume system resources, the most important of these being CPU time and memory.

• True

• False

Answer explanation

Processes consume system resources such as processing time and memory.

Pressing the ___ key within top sorts processes by memory use, thus identifying the ones that are consuming the most memory.

M

C

^

• M

• C

• A

Answer explanation

The M key is used to show which processes are using the most memory.

The Mem: line reveals total ____________

• CPU statistics

• RAM statistics

• System information

Answer explanation

The RAM statistics are displayed in the Mem: line of the program.

Daemons are basically

• programs that run in the background

• a type of virus that destroy system files

• system files

Answer explanation

Daemons are programs that run in the background, such as web servers, print servers, and other services like these.

Consulting log files can therefore be an important part of diagnosing problems with daemons.

• True

• False

Answer explanation

Logs are useful in determining issues with daemons since daemons do not always output their errors to the screen.

Linux stores most log files in the __________ directory tree.

• /var/system

• /sys/var/log

• /var/log

Answer explanation

The /var/log folder contains most of the logs on a Linux system by default.