In the previous post, we talked about writing practical shell scripts and we saw how it is easy to write a shell script. Today we are going to talk about a tool that does magic to our shell scripts, that tool is the Expect command or Expect scripting language. Expect command or expect scripting language is […]
In the last post, we talked about regular expressions and we saw how to use them in sed and awk for text processing, and we discussed before Linux sed command and awk command. During the series, we wrote small shell scripts, but we didn’t mix things up, I think we should take a small step further […]
In order to successfully work with the Linux sed editor and the awk command in your shell scripts, you have to understand regular expressions or in short regex. Since there are many engines for regex, we will use the shell regex and see the bash power in working with regex. First, we need to understand […]
In the previous post, we talked about sed command and we saw many examples of using it in text processing and we saw how it is good in this, but it has some limitations. Sometimes you need a more advanced tool for manipulating data, one that provides a more programming-like environment, giving you more control […]
Before we talk about bash functions, let’s discuss this situation. When writing bash scripts, you’ll find yourself that you are using the same code in multiple places. If you get tired of writing the same blocks of code over and over in your bash script, it would be nice to write the block of code […]
In the previous post, we talked about input, output, and redirection in bash scripts. Today we will learn how to run and control them on Linux system. Till now, we can run scripts only from the command line interface. This isn’t the only way to run Linux bash scripts. This post describes the different ways to […]
In the previous post, we talked about parameters and options in detail, today we will talk about something very important in shell scripting which are Input, Output, and Redirection. You can display the output from your shell scripts in two ways: Display the output on the screen. Redirect the output to a file. So how […]
So far you’ve seen how to write Linux bash scripts that interact with data, variables, files, and how to control the flow of the bash script. Today we will continue our series about Linux bash scripting. I recommend you to review the previous posts if you want to know what we are talking about. bash […]
In the previous post, we talked about how to write a bash script, and we saw how bash scripting is awesome. In this post, we will look at the structured commands that control the flow of your shell scripts. This post demonstrates for loop and while loop in bash scripts. for Command The bash shell […]