Summary
After reading this chapter, you now know how to create and modify environment variables in a shell. You also know how .bashrc and .bash_profile help in making changes that are available permanently for all sessions of a user. You learned how to search the history of commands that we have previously executed and also how to run and manage different tasks in a shell by using the fg and bg shell built - in commands.
In the next chapter, we will see what important types of files are available on Linux-based systems and what operations can be performed on them to get meaningful results.
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