Learn Linux Shell Scripting - Fundamentals of Bash 4.4

Yes-no check

We'll show one more check before we finish this chapter. Halfway through the book, in Chapter 9, Error Checking and Handling, we presented a script that dealt with a user that could supply either a 'yes' or a 'no'. But, as we explained there, the user might also use 'y' or 'n', and perhaps even a capital letter in there somewhere. By secretly using a little Bash expansion, which you will see properly explained in Chapter 16, Bash Parameter Substitution and Expansion, we were able to make a relatively clear check for user input. Let's get that thing in our library!

reader@ubuntu:~/scripts/chapter_13$ vim ~/bash-function-library.sh reader@ubuntu:~/scripts/chapter_13$ cat ~/bash-function-library.sh #!/bin/bash##################################### ...