What is a Bash Script and How to Write It in Linux

Jul. 26, 2023

What is Bash Script in Linux

For example:

For example, to store “John” inside the variable “name”:

To access the value stored inside the “name” variable, simply add a “$” symbol in front:

Here, the value stored inside the “name” variable gets plugged into the echo statement which then prints the final output as:

The echo command is a simple yet useful command which is used to print values as output. The syntax to print using the echo command is:

Sometimes you may need to take situational decisions depending on different conditions. In bash, you can take different decisions withif,thenandelsecommands with the following syntax:

For example, to check if two values in a variable are equal or not:

Here’s a breakdown of the above syntax:

For example, to print all integers between 1 and 5:

In general, while loops are used when you don’t know exactly how many times you need to repeat a particular set of statements. They will continue to repeat the statements until a particular set condition is met. The syntax to use the while loop is –

In the above syntax:

For example, to print all integers between 1 and 5:

OR

Seems complicated? Let’s break it down into parts:

For example, to make the file test.sh as executable:

To run the test.sh file:

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