introduction

Excercise 1

Create a script that copies the contents of the file textcontent.txt to textcontent.old.txt and deletes the contents of of the original file

Solution

Available in the solution.sh file, in this directory.

Key Concepts

• #! called sha-bang, specifies which command intepreter to use for the script. In our case we use the bash interpreter at /bin/bash.
• To make a script executable, the easiest way is to chmod it with exec permissions as in chmod +x <add_your_script_file_name_here>.sh.
• To clear contents of a file redirect the output of /dev/null to it.
• Exit status code 0 means a successfull exit, non-zero exit codes means script/command execution errored.
• To check the exit code of the previously run command use echo $?.