Chapter 1. Shell Something Out

In this chapter, we will cover:

• Printing in the terminal

• Playing with variables and environment variables

• Function to prepend to environment variables

• Math with the shell

• Playing with file descriptors and redirection

• Arrays and associative array

• Visiting aliases

• Grabbing information about the terminal

• Getting and setting dates and delays

• Debugging the script

• Functions and arguments

• Reading output of a sequence of commands in a variable

• Reading n characters without pressing the return key

• Running a command until it succeeds

• Field separators and iterators

• Comparisons and tests