CHECK ON LEARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1!!!!!!!!

Unix systems are characterized by a modular design that is sometimes called the, what?

Unix Philosophy

The Unix operating system should provide a set of simple tools known as, what?

coreutils

What is the name of the GNU kernel?

Unix/BSD

The POSIX shell is the same as which shell?

Bourne Shell

What is the default shell on GNU/Linux?

Bash

True or False: The CLI, terminal, and shell are just different names for the same thing.

False

What is the root of the filesystem?

/

What is the name of the user that lives in kernel land?

root

What is the home directory of the root user?

/root

What is the administrator on a Linux system?

Super User (SUDO)

What is a device driver?

Driver that communicates between applications and hardware

What are the two types of device drivers?

User mode and Kernel Mode

Where are log files kept?

/var/log

Where are system configuration files located?

/etc

The /usr/bin directory contains required binaries.

True

What is the ~ short for?

The users home directory

What is a single dot short for?

Current working directory

Where does the absolute path for a file or directory start?

/

What is the fundamental interface between an application and the Linux kernel?

system call interface

What is the command to pull up system calls by number on a Linux machine?

ausyscall

What is the name of the C library on GNU/Linux called?

glibc

What is the file type for executable files in Unix/Linux?

elf

What does the mmap system call do?

memory map

True or False: A reboot is required when one installs a LKM?

False

What is the command to list loaded kernel modules?

lsmod

What does the .ko file extension stand for?

kernel object

What are some of the common arguments used with the ps command?

-l (list)

What is a type of process that runs in the background without any human interaction?

Daemon

What are the three types of login shells?

Login, Interactive, Non-Interactive

What shell actively reads commands from user input?

interactive

What argument is used with the "su" command to open a BASH login?

-

What argument opens a BASH login with the "bash" command?

-l

What is the restricted BASH shell called?

rBash

What command is used to print environmental variables?

printenv

What environmental variable is checked when we execute a command in the shell?

$PATH

Name one file transfer protocol based on SSH.

SFTP

What is an administrator account?

Super User (SUDO)

What type of account do users like Apache have?

service account

What of accounts belong to users like sys or a daemon?

system account

What file contains user information?

/etc/passwd

Where are user password hashes stored?

/etc/shadow

Where are local user configurations stored?

.bashrc

What restricts the rights and access of a user to the minimal amount required to perform their role?

principal of least privilege

What element of user management says administrators of a system should not share accounts?

individual accounts

What command is used to check network connectivity?

ping

What command is used to display the routing table?

route

What information do you need to configure an IP address?

IP Address, Gateway Address, Network Mask

What are three command line tools used to interact with Networkd?

networkctl, nmtui, nmcli

The d after a process name ie Networkd stands for what?

daemon

Samba’s functionality comes from what two protocols?

SMB, CIFS

What does Samba do?

provide file and print sharing between different Operating Systems.

Samba security modes are set in which file?

smb.conf

What are the two security modes in Samba?

Share-Level, User-Level

The majority of Apache servers run on what system?

Linux

Where is the index.html file located?

/var/www/html

What are the symbols used to denote request and response headers?

request: >

response: <