Basic Linux Commands

ls - List Directories Content (in windows we call these as a folders)

cd - Changes the current directories

pwd - Displays the present working directory

cat - Concatenates and display files

echo - Display Arguments to the Screen

man - Display the Manual (and this can be used with specific commands to show the manual for them)

exit - Exit the shell or your current Session

which - locate a command by searching the directories specified by the environmental variable PATH (see Below)

clear - Clears the Screen

What are Environment Variables and what is $PATH?

environment variables are a set of dynamic named values, stored within the system that are used by applications launched in shells.

there are systemwide and User-Defined Variables.

example on the systemwide Variables is $PATH

where $PATH is an environment variable specifying where executable programs are located.