Why am I getting 'add-apt-repository: command not found'?
The 'add-apt-repository: command not found' error occurs because the 'add-apt-repository' command is missing from your system. This command is part of the 'software-properties-common' package, which is not installed by default in some Ubuntu or Debian-based distributions.
To resolve the error, update your package lists and install the necessary package:
sudo apt update
sudo apt-get install software-properties-common
After installation, you can use the command to add new APT repositories to your system.
How to resolve 'add-apt-repository: command not found' error?
Update your package lists and install the software-properties-common package:
sudo apt update
sudo apt-get install software-properties-common
For Dockerfiles, include these lines to install the required package:
RUN apt-get update &&
apt-get install -y software-properties-common &&
rm -rf /var/lib/apt/lists/*
This setup prepares your system or Docker image for additional repositories without the typical add-apt-repository: command not found issue.
How to verify the 'add-apt-repository' installation?
To verify the 'add-apt-repository' installation, use the help command:
add-apt-repository --help
This command confirms the presence of add-apt-repository on your system and ensures it's functioning correctly. The output should display a help menu with options and explanations related to the command's usage.
How to correctly add an APT repository after installation?
After verifying the add-apt-repository command's functionality, you can add a new APT repository:
For a PPA:
sudo add-apt-repository ppa:some/ppa
For a standard repository:
sudo add-apt-repository "deb [arch=amd64] http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib"
After adding a repository, update your system's package list:
sudo apt update
This ensures your system recognizes the new software sources. Add repositories from verified and trusted sources to maintain system integrity and security.
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