# Save your editing session and exit the text editor (eg. with vi: press '''ESC''', then type ''':wx''' followed by '''ENTER''').<br><br>

# Add execute permissions for the owner of this script and run this script.<br>What do you notice? <br><br>

# If you encounter errors, make corrections and '''re-run''' the checking script until you<br>receive a congratulations message, then you can proceed.<br><br>

:In the next investigation, you will learn to create and test-out the '''~/.bashrc''' start-up file to customize your Bash shell.

# Exit your current Bash shell session.<br><br>

# '''Login''' again to your matrix account.<br><br>Did you start-up file customize your Bash shell environment with colours?<br><br>

# If you encounter errors, make corrections and '''re-run''' the checking script until you<br>receive a congratulations message, then you can proceed.<br><br>

# Issue the following linux command to restore your previous settings for your bashrc startup file:<br><span style="color:blue;font-weight:bold;font-family:courier;">mv ~/.bashrc.bk ~/.bashrc</span><br><br>If you experience an error message "''No such file or directory''", just ignore.<br><br>