Summary
Although this chapter has been rather short, we covered a good bit of important information. We began by looking at environmental variables, showing how to modify one of them, and explaining why you might need to use environmental variables in your shell scripts. Next, we covered programming variables, explaining how to create and export them. Finally, we did a bit of plumbing work by creating some pipelines.
In the next chapter, we’ll cover the concept of input/output redirection. I’ll see you there.
