Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Summary

We started this chapter off by creating and running our very first shell script. As is almost mandatory when learning a new software language, we printed Hello World! onto our Terminal. Continuing, we explained the shebang: the first line of a script, it is an instruction to the Linux system about the interpreter it should use when running the script. For a Bash script, the convention is to have the file name end in .sh, with a shebang of #!/bin/bash.

We explained that there are multiple ways in which we can run a script. We can start with the interpreter and pass the script name as the argument (for example: bash hello-world.sh). In this case, the shebang is not needed because we're specifying the interpreter on the command line. ...