Conditional Statements: There are total 5 conditional statements available in the bash programming,Which can be implemented in the different situation in the bash/shell programming. if statement if-else statement if..elif..else..fi statement (Else If ladder) if..then..else..if..then..fi..fi..(Nested if) switch statement if statement If statement is the simplest statement in the series.Where it is used to compare the two variable. […]
Category Archives: Shell Scripting
Shell Scripting Functionality
Whatever you can do with shell script, you can do with perl and python too or in general any scripting language. However These languages have advantage and disadvantage over each other. Here are the few reasons why i use the scripts. You can write a script to initialize something at boot time of the system. […]
Unix / Linux – Shell Basic Operators
There are various operators supported by each shell. We will discuss in detail about Bourne shell (default shell) in this chapter.According to the operation performed on the operators it has been classified into the below types. We will now discuss the following operators − Arithmetic Operators Relational Operators Boolean Operators String Operators File Test Operators […]
Unix / Linux – Special Variables
In the last post we learned how to declare variables and how to naming conventions.Where we can only use the “_” underscore symbol in the variable name.Where excluding “_” symbol we can not able to use other symbol. This is because those characters are used in the names of special Unix variables. These variables are […]
Shell Scripting Variables Declaration
A variable is a character string where we stores a value. The value assigned could be a number, text, filename, device, or any other type of data. A variable is nothing more than a pointer to the actual data stored. The shell enables you to create, assign, and delete variables.Their are some predefined convention as […]
Shell Scripting Basic | Understanding Linux Shell
Simply definition, the shell is a program that takes inputs as commands from the keyboard and gives them to the operating system to perform action . In the older days, it was the only way of user interface available on a Unix-like system such as Linux. Nowadays, we have graphical user interfaces (GUIs) in addition to command line […]
Advanced Linux Commands to Make You Expert User
A alias The alias command is a way to keep your command /commands in a temporary variable. Unix commands using a shorter name than those that are usually associated with such commands. Syntax:alias shortName=”your custom command here”Example: alias wr=”cd /var/www/html” apt-get APT (Advanced Package Tool) is the command line tool to interact with this packaging system. There is already […]
How to Press or Fire Keyboard Event by Shell Scripting Technique
In most of the programming language the key press events are not comes as inbuilt feathers.At that point of time we need support of the shell scripting technique.In this post you will find the use and the different shortcut key available for this . For VB Shell Scripting Scripting we need to create the code […]