2. Running `awk` and `gawk`

This chapter covers how to run awk, both POSIX-standard and gawk-specific command-line options, and what awk and gawk do with non-option arguments. It then proceeds to cover how gawk searches for source files, reading standard input along with other files, gawk’s environment variables, gawk’s exit status, using include files, and obsolete and undocumented options and/or features.

Many of the options and features described here are discussed in more detail later in the Web page; feel free to skip over things in this chapter that don’t interest you right now.

2.1 Invoking `awk`		How to run `awk`.
2.2 Command-Line Options		Command-line options and their meanings.
2.3 Other Command-Line Arguments		Input file names and variable assignments.
2.4 Naming Standard Input		How to specify standard input with other files.
2.5 The Environment Variables `gawk` Uses		The environment variables `gawk` uses.
2.6 `gawk`’s Exit Status		`gawk`’s exit status.
2.7 Including Other Files Into Your Program		Including other files into your program.
2.8 Obsolete Options and/or Features		Obsolete Options and/or features.
2.9 Undocumented Options and Features

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2. Running awk and gawk

2. Running `awk` and `gawk`