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How To Install G++ on Ubuntu 22.04 LTS

Install G++ on Ubuntu 22.04

In this tutorial, we will show you how to install G++ on Ubuntu 22.04 LTS. G++, the C++ compiler of the GNU Compiler Collection, is your gateway to efficient and optimized code execution. As a cornerstone of software development, G++ compiles your C++ programs into executable files that run seamlessly on Ubuntu. This compiler’s significance lies not just in its functionality but also in its role as a bridge between your code and the operating system.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the GNU G++ Compiler on Ubuntu 22.04. You can follow the same instructions for Ubuntu 22.04 and any other Debian-based distribution like Linux Mint, Elementary OS, Pop!_OS, and more as well.


  • A server running one of the following operating systems: Ubuntu 22.04, 20.04, and any other Debian-based distribution like Linux Mint.
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • SSH access to the server (or just open Terminal if you’re on a desktop).
  • An active internet connection. You’ll need an internet connection to download the necessary packages and dependencies for G++.
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install G++ on Ubuntu 22.04 LTS Jammy Jellyfish

Step 1. First, make sure that all your system packages are up-to-date by running the following apt commands in the terminal.

sudo apt update
sudo apt upgrade

Step 2. Installing G++ on Ubuntu 22.04.

With your package list updated, it’s time to bring G++ into your programming arsenal. Execute the following command in your terminal:

sudo apt install g++

Wait for the installation to complete. Once done, you can check the version of G++ installed by running the following command:

g++ --version

Step 3. Compiling Your First G++ Program.

To truly appreciate G++, let’s create a simple “Hello, World!” program.

#include <iostream>

int main() {
std::cout << "Hello, World!" << std::endl;
return 0;

This concise program demonstrates the power of G++. Save it as hello.cpp.

  • Enhancing Compilation with Flags.

Compiling isn’t merely about translation—it’s about optimization. Flags are your allies in this journey.

Scenario 1: Specifying Output File:

Consider this scenario: you have a program named my_program.cpp. Compile and specify an output file named my_output using the -o flag:

g++ my_program.cpp -o my_output

Scenario 2: Enabling Warnings:

To improve your code’s robustness, enable warnings with the -Wall flag:

g++ -Wall my_program.cpp -o my_output
  • Handling Multiple Source Files:

Complex projects often span multiple files. Let’s master compiling multiple sources with G++.

Imagine you have two source files, main.cpp and helper.cpp. Compile them together:

g++ main.cpp helper.cpp -o my_program

Step 4. Common Installation Issues and Troubleshooting.

The journey to G++ installation can encounter roadblocks. Let’s navigate through some common issues:

  1. Package Conflicts: If you encounter conflicts during installation, check if you have any existing software sources that might conflict with G++. Remove or update them before proceeding.

  2. Dependency Errors: G++ might have dependencies that aren’t satisfied by default. If you encounter dependency errors, run sudo apt-get -f install to automatically fix these issues.

Congratulations! You have successfully installed G++. Thanks for using this tutorial for installing GNU G++ Compiler on the Ubuntu system. For additional help or useful information, we recommend you check the official G++ website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to idroot.us, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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