Hello readers, In this post, we will cover how to get started with shell scripting in Linux or UNIX systems. What is a Shell? A shell is an interpreter in UNIX/Linux like operating systems. It takes commands typed by the user and calls the operating … Read more
It is always recommended to use encrypted passwords in Linux bash shell scripts. Typically, in bash shell script we may need password for remote user while connecting to remote system, ftp user and proxy user etc. In this article, we will cover how to encrypt … Read more
It is found that in any Linux/Unix based Operating Systems it is good to understand fork and vfork system calls, how they behave, how we can use them and differences between them. Along with these wait and exec system calls are used for process spawning … Read more
Function is a reusable block of code. Often we put repeated code in a function and call that function from various places. Library is a collection of functions. We can define commonly used function in a library and other scripts can use them without duplicating … Read more
In this tutorial on Linux bash shell scripting, we are going to learn how to compare numbers, strings and files in shell script using if statement. Comparisons in a script are very useful & after comparison result, script will execute the commands and we must … Read more
In this tutorial, we will learn how to pass command line arguments to a bash shell script in Linux. Command line arguments are the arguments specified at the command prompt with a command or script to be executed. The locations at the command prompt of … Read more
In most of the programming languages, debugger tool is available for debugging. A debugger is a tool that can run a program or script that enables you to examine the internals of the script or program as it runs. In this post, we will learn … Read more
Q:1 What is Shell Script and why it is required ? Ans: A Shell Script is a text file that contains one or more commands. As a system administrator we often need to issue number of commands to accomplish day to day tasks, we can … Read more
Every process in Linux is provided with three open files( usually called file descriptor). These files are the standard input, output and error files. By default : Standard Input is the keyboard, abstracted as a file to make it easier to write shell scripts. Standard … Read more
In this guide, we will learn how to use conditional statements like if, if-else, If-elif-else, netsted if and case in the bash script. Conditional statements plays an important role in bash script as it helps to take decision based on the condition. In a bash … Read more
In this post, we will discuss how to use variables in bash shell scripting with examples. In every programming language variables plays an important role , in Linux shell scripting we can use two types of variables : System Defined Variables & User Defined Variables. … Read more
