Linux Programming Practice Tutorial PDF20

Introduction

Linux is a free and open-source operating system that has become increasingly popular in recent years. It is used by a wide variety of organizations, from small businesses to large corporations, and is also popular among hobbyists and enthusiasts. Linux is a powerful and versatile operating system, and there are many things that you can do with it. However, getting started with Linux can be a bit daunting, especially if you are not familiar with the command line.

This tutorial will provide you with a practical introduction to Linux programming. We will cover the basics of the Linux command line, as well as how to write and compile simple C programs. By the end of this tutorial, you will have a basic understanding of Linux programming and be able to write your own simple programs.

Prerequisites

Before you begin this tutorial, you will need the following:
A computer running Linux
A text editor
A C compiler

Getting Started

The first step is to open a terminal window. You can do this by pressing Ctrl+Alt+T. Once you have a terminal window open, you can type the following command to create a new file:```
touch hello.c
```

This will create a new file called hello.c in your current directory. Open the file in your text editor and type the following code:```
#include
int main() {
printf("Hello, world!");
return 0;
}
```

Save the file and then compile it using the following command:```
gcc hello.c -o hello
```

This will create a new executable file called hello. You can run the program by typing the following command:```
./hello
```

This will print the message "Hello, world!" to the console.

The Basics of the Linux Command Line

The Linux command line is a powerful tool that allows you to control your computer. It can be used to perform a wide variety of tasks, such as creating and editing files, running programs, and managing your system.

Here are some of the most common commands:
ls: Lists the files in the current directory
cd: Changes the current directory
mkdir: Creates a new directory
rmdir: Removes a directory
touch: Creates a new file
rm: Removes a file
cat: Concatenates files and print the result
more: Display the content of a file one page at a time
less: Similar to more but can be navigated with arrow keys
grep: Search for a pattern in a file
find: Search for files in a directory
sudo: Run a command as root

Writing C Programs

C is a powerful programming language that is used to develop a wide variety of applications. It is a relatively low-level language, which means that it gives you a lot of control over your code. However, this also means that it can be more difficult to learn than some other languages.

Here is a simple C program that prints the message "Hello, world!" to the console:```
#include
int main() {
printf("Hello, world!");
return 0;
}
```

To compile this program, you can use the following command:```
gcc hello.c -o hello
```

This will create a new executable file called hello. You can run the program by typing the following command:```
./hello
```

This will print the message "Hello, world!" to the console.

Conclusion

This tutorial has provided you with a practical introduction to Linux programming. We have covered the basics of the Linux command line, as well as how to write and compile simple C programs. By the end of this tutorial, you should have a basic understanding of Linux programming and be able to write your own simple programs.

If you want to learn more about Linux programming, there are many resources available online. You can find tutorials, documentation, and examples that can help you learn more about the Linux operating system and how to write programs for it.

2024-12-02

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