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.

#! 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 $?.