Ubuntu

The command to run an .sh file is    sh file1.sh An .sh file is written this way:    #!/bin/sh    echo "my message" > file1.txt The above codes create a file file1.txt with the text my message on it. The .sh file can also be run this way too: Chmod is a change mode command where x represent execute. chmod command is used for various purpose. In our case we are simply trying to set an executable permission to the file   chmod +x file1.sh Then give this code to run the file    ./file1.sh In the above code the character dot . represents the current directory.