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→INVESTIGATION 1: CREATING A SHELL SCRIPT
# Issue the following linux command to check if your intended shell script name<br>is already exists to be run automatically from the Bash shell:<br><span style="color:blue;font-weight:bold;font-family:courier;">which hello</span><br><br>You should notice that there is no output and therefore, this shell script name can be used.<br>On the other hand, if you wanted to create a file called sed, then the '''which sed''' command<br>would indicate it is already being used by the shell and that '''sed''' wouldn't be an appropriate shell script name to use.<br><br>
# Use a text editor like vi or nano to create the text file called hello (eg. <span style="color:blue;font-weight:bold;font-family:courier;">vi hello</span>)<br><br>
# Enter the following line two lines in your shell script, replacing "your name" with your actual name:<br><span style="font-family:courier;">clear<br>echo "Hello Your Name"</span><br><br>#xSave your editing session and exit the text editor (eg. with vi: press ESC, then type :wx followed by ENTER).<br><br># Issue the following linux command to run your shell script in your current directory:<br><span style="color:blue;font-weight:bold;font-family:courier;">./hello</span><br><br>You should notice an error indicating you don't have permissions to run the file. You need to first add execute permissions prior to running the shell script.