14. Shell and environment variables

Shell and environment variables

Let see what more we can do with the Shell.

Use the workspace below the video to practice the commands and remember to practice locally in your computer too.

Ud206 017 Shell P11 - Variables

## Workspace

You can use this workspace to test your commands.

Workspace

This section contains either a workspace (it can be a Jupyter Notebook workspace or an online code editor work space, etc.) and it cannot be automatically downloaded to be generated here. Please access the classroom with your account and manually download the workspace to your local machine. Note that for some courses, Udacity upload the workspace files onto https://github.com/udacity, so you may be able to download them there.

Workspace Information:

  • Default file path:
  • Workspace type: repl
  • Opened files (when workspace is loaded): n/a

Shell or environment?

Do you think the PWD variable is a shell variable or an environment variable?

(Don't know what it is? Try echo $PWD.)
SOLUTION: Environment variable

Display two variables

QUESTION:

Write a shell command using echo that displays the contents of the variables LOGNAME and PWD with a space between them.
Note: In Git bash in Windows you won't get the result from LOGNAME variable because it doesn't exist, try using the command whoami instead.

SOLUTION:

echo $LOGNAME $PWD

Recomendation

The Shell commands can be installed or not on your computer if you are using Linux or Mac and you have issues running the commands check the documentation specifically for the Operating System.

Next Concept