Mastering Bash Programming in Termux

Hey Guys, It’s me SaadMaqsood 🙋🏻‍♂️, So I have already written a post
on
how you can learn python using termux. and most of you DM with the question “How to Mastering Bash Programming in Termux?“. In this post, you are going to learn how you can easily learn bash
programming in termux. This post serves as your guide to understanding the
fundamentals of Bash programming and harnessing its power within the Termux
environment. It can be a little complex but once you understand the
structure and scripting language, you will be able to create any bash
script you want on your own. 🔥

Bash, short for the Bourne Again Shell, is a command-line shell and
scripting language widely used in Unix-like systems.
Learning Bash
programming opens up a plethora of opportunities, allowing users to automate tasks,
create powerful scripts, and efficiently manage system resources.
Bash proficiency is not only valuable for system administrators and
developers but is also an essential skill for anyone seeking to optimize
their workflow and enhance their technical capabilities.

Bash programming is renowned for its accessibility, making it an
excellent choice for beginners delving into the world of scripting.

The simplicity of its syntax and the vast community support provide a
smooth learning curve for those new to programming. However, the versatility
of Bash also caters to advanced users,
offering the depth needed for complex scripting and automation tasks. Whether you are a novice or an experienced coder, mastering Bash in
Termux is an enriching and empowering journey.

Getting Started with Bash Scripting in Termux:

1. Create a Bash Script:

To create a Bash script, use the nano text editor. For example,
create a script named memory_check.bash:

Open your termux and type the below command to create a new bash file name
memory_check.bash

nano memory_check.bash



2. Write your script:

Add the following code to check the system’s memory usage:

#!/bin/bash

free -h -t

read b

echo “Total Memory: $b”



3. Make the script executable:

To run the script, make it executable:

chmod +x memory_check.bash



4. Run the script:

To run the script, simply type its name:

./memory_check.bash

Bash Scripting Basics:

1. Comments:

Use the `#` symbol to add comments to your scripts. Comments help
you and others understand the purpose of each line of code.

2. Variables:

Variables are used to store values. For example, to store the memory
usage in a variable named `memory`, use the following format:

memory=$(free -h -t | grep Mem | awk ‘print $2’)

3. Conditional Statements:

Use `if`, `elif`, and `else` statements to make decisions based on
conditions. For example, to check if the memory usage is greater than 50%,
use the following code:

memory_percent=$(free -h -t | grep Mem | awk ‘print $3’)

if [ $(echo “$memory_percent > 50” | bc -l) -eq 1 ]; then

echo “Memory usage is greater than 50%”

else

echo “Memory usage is less than or equal to 50%”

fi

4. Loops:

Use `for`, `while`, and `until` loops to repeat a block of code. For
example, to print the numbers from 1 to 10, use the following code:

for i in 1..10; do

echo $i

done

What’s Next After Basics?

After knowing all this, you can go on
github and search for termux tools that you like, go and check out the code of
those tools, and try to understand them. You can take inspiration from the
codes of those tools and try to create something new out of
them. 

Try to write basic lines termux tools using bash like:

  1. Creating custom commands.
  2. Understanding Alias for faster workflow.
  3. Listing and sorting directories
  4. Creating an alarm clock
  5. Creating a sales tax calculator
  6. Detecting mounted disks
  7. Building a recursive countdown generator
  8. Accepting arguments and sorting directories
  9. Creating a simple script to display disk usage
  10. Building a basic script to perform basic math operations

Practicing Bash Scripting in Termux:

1. Create a Bash Script Widget:

To create a Bash script widget, follow the steps outlined in the
Termux Widgets post.

2. Use Termux Ubuntu:

To practice Bash scripting in a more familiar environment,
Install Termux Ubuntu.

3. Install Additional Tools:

To enhance your scripting experience, install additional tools like `nano`,
`curl`, `proot`, and `tar`, as described in the
Termux Kali Linux post.

Conclusion:

Embracing Bash programming in the
Termux environment is a transformative experience
. It not only opens doors to a new realm of possibilities for mobile
users but also equips individuals with a valuable skill set for optimizing
workflows and automating routine tasks. The accessibility of Bash, combined
with the practicality of Termux, creates a dynamic learning
environment suitable for individuals of all skill levels. So, embark
on this journey of mastering Bash programming in Termux, and unlock
the potential of scripting on your mobile device. Stay Ethical.👾

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