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User
Informative
Miscellaneous
Interactive/mostly
100

This is the Bash command to change directories

What is cd

100

This command will allow to switch users

What is "su"

100
This Bash command is a lot like Windows task manager
What is top
100

this command is a a dns lookup tool

What is dig

100

This command will shut down or stop a process

What is kill

200

This command will print the current working directory

What is pwd

200

This command navigates up one directory level

What is cd ..

200
This Bash command will list all of the processes running on a system
What is ps
200

This command will display what ports are open and listening on a server

What is netstat

200
This command will delete a file
What is rm
300

This command will display the contents of a directory including hidden files

What is ls -a

300

This command will display other logged in users

What is who

300
If you only know this one command you can use it to find out how all of the others work
What is man
300

This command creates an empty file.

What is touch

300

This command will move and/or rename a file

What is mv

400

This flag when used with the "ls" command sorts the output according to file modification time

What is -t

400

This command will display who was recently on the computer

What is last

400

This command will show disk usage

What is df

400

This command displays the IP address of a server.

What is ifconfig

400

This command will print the last 15 lines of a file called Comp_Sys

What is tail -15 Comp_Sys

500

These are the two ways to signify that a string is a command option.

What is "-" or "--"

500

This user is on all Linux systems, and has virtually unlimited privileges

Who is root

500

This command displays all of the files in a directory as well as all of the files in all it's subdirectories 

What is ls -R

500
This command will search through a file line by line for the given string
What is grep
500

This command will print out a file to standard output.

What is cat

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