In this tutorial, we’ll be going over the Linux watch command and how we can utilize it in our Linux administration work. Essentially, the watch command is a utility that allows us to continually execute a command at specific intervals and monitor the differences between the outputs. Why could this be useful? For a lot
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In this tutorial, we are going to discuss how to change the user password in Linux. The instructions given below can work on any Linux distribution. The passwd command is used to update or change the user’s authentication token. There are two types of users; normal users, and the root user. The normal user can
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The Linux which command is used to identify the path of executable files. The path is identified by searching it in the path environment variables. Syntax of Linux which is as follows: What is the PATH variable? PATH is an environment variable in Linux and other Unix-like operating systems that tells the shell which directories
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In this tutorial, we’ll cover the killall command in Linux. We recently posted a tutorial on the kill command in Linux where we covered the usage and the functionality of the command. Today, we’ll go over how to use the killall command in Linux, and understand the difference between kill and killall commands. What is
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PostgreSQL, or Postgres, is a relational database management system that provides an implementation of the SQL querying language. It is a popular choice for many small and large projects, having many advanced features like transaction management and transaction without read-locks, which are essential for a high performant database. Now, in this tutorial, let us look
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In this article of the shell scripting tutorial series, we’ll learn how to create and use variables in shell scripts. We’ll walk through the different variables that we can make use of that are provided by the system for the Bourne Shell and how to create custom variables to use throughout a shell script. Variables
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In the previous shell scripting tutorial, we worked with simple variables in shell scripts. Today we’ll cover arrays in shell scripts, and how we can create and make use of arrays within our scripts. To declare or create arrays on the fly, we will use the declare command (more explicit) or directly write array_name=(element1 element2
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In our previous tutorial, we learned the use of the while loop in shell scripts. Now, let’s make use of the break and continue statement in Linux and manipulate the flow of loops. As we know, a loop will end if the condition supplied to it becomes FALSE. But what if you’re running a loop
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After learning the basics in our previous tutorials about if-else statements, switch-case statements, etc, it’s time to create functions in shell scripts. Functions help us divide scripts into different sections and make the code more portable as well as reusable. Defining Functions in Shell Scripts The basic syntax for defining a function is just the
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Continuing our series, in today’s article, we’ll go over the until loop in shell scripts. We’ve already covered for loops and while loops in shell scripts in our previous tutorials. You’ll find a lot of similarities in the while and until loop so we’ll also look at the differences between both the loops in this
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