Working with Commands

In the last chapter, you learned about using more, less, head, and tail commands, and text processing tools such as diff, cut, paste, comm, and uniq. You learned what standard input, output, and standard error are. You also learned about metacharacters and pattern matching using vi and grep.

In this chapter, you will learn the following topics:

• Learning shell interpretation of commands
• Working with command substitution
• Working with command separators
• Working with pipes