HP-UX 11i System Administration Handbook and Toolkit, Second Edition

Three Commands

The three commands covered in this chapter, along with regular expressions (pattern matching), are often grouped together. There are even many books available devoted to awk and sed. In these books, grep usually goes along for the ride because awk is derived to some extent from sed and grep. In addition, the use of regular expressions for pattern matching that are used for awk, sed, and grep are similar.

We'll take a look at regular expressions and pattern matching in general, and then cover the three commands in this chapter:

• Regular expressions

• sed, awk, and grep commands