What is Bash AWK Command?
Here you will find out:
- what AWK is, its syntax and options
- what AWK is used for
- when DiskInternals can help you
Are you ready? Let's read!
What is AWK?
AWK is a special program designed for simple and mechanical manipulations of data. You may ask, why is such a utility needed? Very simple operations often need to be performed on entire packages of files; for this, you may need to write a program in one of the standard programming languages. And this is a tedious and rather difficult task. So, using a special AWK in a shell script allows you to solve data processing tasks with the help of short programs. They will contain no more than two or three lines, and the program includes a convenient programming language.
What can AWK be used for?
You can use it to perform the following operations:
- to scan files
- to parse input lines into separate fields and compare them with a template
- to modify data files
- to create formatted reports
For all these purposes, you can use string and arithmetic operators, as well as word expressions and cycles.
The syntax and the options of an AWK command
The syntax is quite simple:
The options may be as follows:
- f file - to indicate an AWK script file.
- F fs - to indicate the input field separator.
What are the AWK variables?
Pay attention to the following example of AWK in a bash script:
Keep in mind:
$ 0 is the whole line.
$ 1 is the first field.
$ 2 is the second field.
$ x is for the xth field.
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