Cli

Front 1

IDE

Back 1

Integrated development environment

Front 2

MFA

Back 2

Multi-factor identification

Front 3

CLI

Back 3

Command Line Interface, includes a display and an input

OR Common Language Intfrastructure

Front 4

Node

Back 4

Device or data point in a larger network. (Phone, printer, bridge, server) OR a unit of data structure (linked list, tree data struct)

Front 5

Shell

Back 5

Computer program that exposes an operating systems services using either command line interface or graphical user interface and allows for interaction between the OS and the user or other programs.

Front 6

STDIN

Back 6

Standard input. Input stream in CLI

Front 7

echo

Back 7

Command in Linux/ Bash for text output (STDOUT-standard output). Use >(name) flag at end to save as file

Front 8

pwd

Back 8

Print working directory. Command in Linux/ Bash for info on where you are in system, which directory

Front 9

Commands

Back 9

Instructs system to execute output, frequently requires further instruction from arguments

Front 10

Arguments

Back 10

Provides info for the command. Includes flags. Can be wrapped in quotes but dont always have to be.

Front 11

Flags

Back 11

Special types of arguments that specify what you want the command to act on. (Usually start with - for abbreviations or --for full words)

Front 12

man

Back 12

Manual in Linux. Follow by command.

Front 13

String

Back 13

A sequence of characters

Front 14

-e

Back 14

Flag that enables echo to use backslash\ codes

Front 15

cd

Back 15

Command to change your current directory. cd ~ brings you back to home directory. cd - brings you to previous directory.

Front 16

ls

Back 16

Command that gives you info about what files/ directories are in a directory.

Front 17

touch

Back 17

Command to create contentless file

Front 18

cat

Back 18

Concatenate. Command that displays contents of a file

Front 19

mkdir

Back 19

Make directory command

Front 20

mv

Back 20

Command to move or rename file. mv (source) (destination)

Front 21

rm

Back 21

Remove file, to remove directory add flag -r(recursively) after rm

Front 22

cp

Back 22

Command to copy files to different directory or its own. (Source) (destination)

Front 23

head

Back 23

Command that prints first few lines of file.

Front 24

tail

Back 24

Command that prints last few lines of file.

Front 25

more

Back 25

Command that allows you to print oit only 1 page of text. q to exit.

Front 26

less

Back 26

Command that allows you to scroll up and down in line. q to exit

Front 27

/

Back 27

Root directory.

Front 28

cd .. Also cd ../

Back 28

The directory 1 level up

Front 29

. also ./

Back 29

Current directory

Front 30

../..

Back 30

Directory two levels up

Front 31

~

Back 31

"Home" directory- one youre sent to when you log in

Front 32

*

Back 32

Type any character. Useful for ls.

Front 33

Environment variable

Back 33

"Variables" are used to store data that retrievable by using a name. env will list your preset environment variables.

Front 34

Making Environment Variables

Back 34

Something="another thing"

To call it $Something

Front 35

PS1

Back 35

Variable that contains the value of the default prompt

Front 36

List hidden files in directory

Back 36

ls -a (ls -a [name of directory])

Front 37

which

Back 37

Command that shows where files are

Front 38

Environment variable that finds all locations of command

Back 38

$PATH

Front 39

bin

Back 39

Binary

Front 40

PATH

Back 40

Variable determines which creates the list of directories that defines the location of executables

Front 41

Ownership

Back 41

Permission type. Includes user, group, and other.

Front 42

Access

Back 42

Permission part. Includes read, write, execute.

Front 43

tree

Back 43

Command that displays a directory and its sub-directories

Front 44

Permissions

Back 44

Granted to files or directories not users or groups.

d(directory)(user)rwx(group)rwx(other)rwx [user] [group]

Front 45

chmod

Back 45

Command that adds or denies permissions to a file (+r +w +x) (-r -w -x)

Front 46

-lah

Back 46

flag to ls. Lists permissions of file.

Front 47

Numerical permission levels

Back 47

0-no permission. 1-can execute. 2-can write. 3-can write and execute. 4-can read. 5-can read and execute. 6-can read and write). 7-can read write and execute.

Front 48

su -

Back 48

Command to log in as root user

Front 49

sudo

Back 49

Temporarily grants root user permissions, may require password

Front 50

Database management commands

Back 50

mysql, psql, redis-client, mango

Front 51

Text editors

Back 51

vim, pico, nano, emacs

Front 52

REPLs

Back 52

Read user input-Evaluate it using scripting language interpreter-Prints result of programming statement-loop(provides prompt for more input). irb, python, php -a, bash.

Front 53

Change environmental varianles

Back 53

VARIABLE="value"

Front 54

Permanent variable changes

Back 54

export in ~/.bashrc