In this guide, we will walk you through the process of installing gcc-8 on Ubuntu 20.04 to resolve the error: “Package gcc-8 has no installation candidate”. This error typically occurs when the gcc-8 package is not available in the default repositories of Ubuntu 20.04. We will provide two solutions to tackle this issue.
To install gcc-8 on Ubuntu 20.04 and resolve the "Package gcc-8 has no installation candidate" error, you have two solutions. The first solution involves adding the Ubuntu 20.04 repository to your sources list and then installing gcc-8 and g++-8 using apt. If that doesn’t work, you can manually download the gcc-8 package and install it using the apt command.
- Solution 1: Add Ubuntu 20.04 Repository
- Solution 2: Manually Download and Install gcc-8
Before we proceed, ensure that you have administrative access to your Ubuntu 20.04 system. This is necessary to execute the commands that we will be using in this guide.
Solution 1: Add Ubuntu 20.04 Repository
The first solution involves adding the Ubuntu 20.04 repository to your sources list. This repository contains the gcc-8 package.
Step 1: Update Package Lists
Start by updating your package lists with the following command:
sudo apt update
sudo command is used to run the following command as a superuser.
apt is the package handling utility in Ubuntu, and
update is the command to resynchronize the package index files from their sources.
Step 2: Add Repository to Sources List
Next, open the
/etc/apt/sources.list file using a text editor. In this example, we will use
sudo nano /etc/apt/sources.list
At the end of the file, add the following line:
deb [arch=amd64] http://archive.ubuntu.com/ubuntu focal main universe
This line adds the Ubuntu 20.04 repository to your sources list. The
[arch=amd64] part specifies that we are adding a repository for 64-bit packages.
Save the file and exit the text editor.
Step 3: Update Package Lists Again
Now, update the package lists again to include the new repository:
sudo apt update
Step 4: Install gcc-8 and g++-8
Finally, install gcc-8 and g++-8 with the following command:
sudo apt install gcc-8 g++-8
Solution 2: Manually Download and Install gcc-8
If the first solution does not work for you, you can try manually downloading and installing the gcc-8 package.
Step 1: Check if gcc-8 is Available
First, check if the gcc-8 package is available in the default repositories:
apt policy gcc-8
If the package is not available, you can proceed with the following steps.
Step 2: Download gcc-8
Download the gcc-8 package from a trusted source. For example, you can download it from Ubuntu 20.04 using the following commands:
sudo apt update wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/gcc-8_8.4.0-3ubuntu2_amd64.deb
wget command is a free utility for non-interactive download of files from the web. It supports HTTP, HTTPS, and FTP protocols.
Step 3: Install gcc-8
Finally, install the downloaded gcc-8 package using the following command:
sudo apt install ./gcc-8_8.4.0-3ubuntu2_amd64.deb
After successfully installing gcc-8, you can use the
update-alternatives command to manage different versions of gcc if needed.
In this guide, we have provided two solutions to resolve the “Package gcc-8 has no installation candidate” error when trying to install gcc-8 on Ubuntu 20.04. Remember to always download software from trusted sources to avoid security risks. Also, using older versions of software may lead to compatibility issues. It is recommended to use containers or virtual machines with older operating systems to isolate vulnerabilities and minimize dependency problems.
gcc-8 is a specific version of the GNU Compiler Collection (gcc). It is a compiler system that supports various programming languages, including C, C++, and Fortran.
This error occurs when the gcc-8 package is not available in the default repositories of Ubuntu 20.04. The default repositories might not include this specific version of gcc.
Yes, you can use a different version of gcc if it is available in the Ubuntu 20.04 repositories. You can check the available versions using the
apt search gcc command.
You can check the currently installed version of gcc by running the command
gcc --version in the terminal.
Adding additional repositories can introduce security risks if the repositories are not trustworthy. It is recommended to only add repositories from trusted sources.
The steps provided in this guide are specifically for Ubuntu 20.04. The availability of gcc-8 and the steps to install it may vary for different Ubuntu versions.
The steps provided in this guide are specifically for Ubuntu 20.04. The package availability and installation methods may differ for other Linux distributions. It is recommended to refer to the documentation or support channels of your specific distribution for instructions on installing gcc-8.