Shell Something Out

In this chapter, we will cover the following recipes:

• Displaying output in a terminal
• Using variables and environment variables
• Function to prepend to environment variables
• Math with the shell
• Playing with file descriptors and redirection
• Arrays and associative arrays
• Visiting aliases
• Grabbing information about the terminal
• Getting and setting dates and delays
• Debugging the script
• Functions and arguments
• Sending output from one command to another
• Reading n characters without pressing the return key
• Running a command until it succeeds
• Field separators and iterators
• Comparisons and tests
• Customizing bash with configuration files