How to Call a Shell Script from Another Script

Here is the way to start another script in a shell script. The purpose is entire logic can keep in one place, and it is easy to maintain.

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The project is to convert US dollars into Indian rupee (assuming 1 USD = 70 INR.). Here are two scripts for this purpose.

conversion.sh
display_currency.sh

Start another script in a shell script

I’ve added conversion logic in this script. And I’ve passed the output to called script.

Here's my first script conversion.sh — A script calling from another script

I’ve initialized the value conv_factor=70. For calculation, I used the let command. The output I’ve saved to converted_rupees.

I’ve used the export command to pass value to the called script, which I used for display. The way I showed here simplifies calling a script from another script. So it is easy to maintain them.

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Here’s the output of the scripts

In this video, you can see the execution of both scripts.

Here’s the output of the scripts

Summary

You can call a script from another script
Use the let command to calculate math-related things (computation)
Export command

Srini

Data Engineer with deep AI and Generative AI expertise, crafting high-performance data pipelines in PySpark, Databricks, and SQL. Skilled in Python, AWS, and Linux—building scalable, cloud-native solutions for smart applications.