# Amazon Corretto 21 Installation Instructions for Debian-Based, RPM-Based and Alpine Linux Distributions
This topic describes how to install Amazon Corretto 21 on Debian-based, RPM-based and Alpine Linux distributions.
If you need to install Amazon Corretto 21 on Amazon Linux, see [Installing on Amazon Linux](amazon-linux-install.md).
## Install Amazon Corretto 21 on Debian-Based Linux
This section describes how to install and uninstall Amazon Corretto 21 on a host or container running a Debian-based operating system.
### Using apt
To use the Corretto Apt repositories on Debian-based systems, such as Ubuntu, import the Corretto public key and then add the repository to the system list by using the following commands:
**Example**
```
wget -O - https://apt.corretto.aws/corretto.key | sudo gpg --dearmor -o /usr/share/keyrings/corretto-keyring.gpg && \
echo "deb [signed-by=/usr/share/keyrings/corretto-keyring.gpg] https://apt.corretto.aws stable main" | sudo tee /etc/apt/sources.list.d/corretto.list
```
After the repo has been added, you can install Corretto 21 by running this command:
**Example**
```
sudo apt-get update; sudo apt-get install -y java-21-amazon-corretto-jdk
```
For old version Ubuntu such as 14.04, you might encounter error like
**Example**
```
GPG error: https://apt.corretto.aws stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A122542AB04F24E3
```
If so, add the public key via:
**Example**
```
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A122542AB04F24E3
```
### Download and Install the Debian Package Manually
1. Before you install the JDK, install the `java-common` package.
**Example**
```
sudo apt-get update && sudo apt-get install java-common
```
1. Download the Linux `.deb` file from the [Downloads](downloads-list.md) page.
1. Install the `.deb` file by using `sudo dpkg --install`. For example install x86\$164 deb using the following command:
**Example**
```
sudo dpkg --install java-21-amazon-corretto-jdk_21.0.10.7-1_amd64.deb
```
### Verify Your Installation
In the terminal, run the following command to verify the installation.
**Example**
```
java -version
```
Expected output for 21.0.10:
```
openjdk version "21.0.10" 2026-01-20 LTS
OpenJDK Runtime Environment Corretto-21.0.10.7.1 (build 21.0.10+7-LTS)
OpenJDK 64-Bit Server VM Corretto-21.0.10.7.1 (build 21.0.10+7-LTS, mixed mode, sharing)
```
If you see a version string that doesn't mention `Corretto`, run the following command to change the default `java` or `javac` providers.
**Example**
```
sudo update-alternatives --config java
```
If you're using the JDK, you should also run the following.
```
sudo update-alternatives --config javac
```
### Uninstall Amazon Corretto 21
You can uninstall Amazon Corretto 21 by using the following command.
**Example**
```
sudo dpkg --remove java-21-amazon-corretto-jdk
```
## Install Amazon Corretto 21 on RPM-Based Linux
### Using yum
To use Corretto RPM repositories with the yum package manager (such as Amazon Linux AMI), import the Corretto public key and then add the repository to the system list. For most systems, you must run the following commands:
**Example**
```
sudo rpm --import https://yum.corretto.aws/corretto.key
sudo curl -L -o /etc/yum.repos.d/corretto.repo https://yum.corretto.aws/corretto.repo
```
After the repository is added, you can install Corretto 21 by running this command:
**Example**
```
sudo yum install -y java-21-amazon-corretto-devel
```
### Using zypper
To use Corretto RPM repositories with the zyppr package manager (such as openSUSE), import the Corretto public key and then add the repository to the system list by running the following commands:
**Example**
```
sudo zypper addrepo https://yum.corretto.aws/corretto.repo; sudo zypper refresh
```
After the repository is added, you can install Corretto 21 by running this command:
**Example**
```
sudo zypper install java-21-amazon-corretto-devel
```
### Download and install RPM package manually
1. Download the Linux `.rpm` file from the [Downloads](downloads-list.md) page.
1. Install the downloaded `.rpm` file using `yum localinstall`. For example install x86\$164 rpm using the following command:
**Example**
```
sudo yum localinstall java-21-amazon-corretto-devel-21.0.10.7-1.x86_64.rpm
```
### Verify Your Installation
In the terminal, run the following command to verify the installation.
**Example**
```
java -version
```
Expected output for 21.0.10:
```
openjdk version "21.0.10" 2026-01-20 LTS
OpenJDK Runtime Environment Corretto-21.0.10.7.1 (build 21.0.10+7-LTS)
OpenJDK 64-Bit Server VM Corretto-21.0.10.7.1 (build 21.0.10+7-LTS, mixed mode, sharing)
```
If you see a version string that doesn't mention `Corretto`, run the following command to change the default `java` or `javac` providers.
**Example**
```
sudo alternatives --config java
```
If you're using the JDK, you should also run the following.
```
sudo alternatives --config javac
```
### Uninstall Amazon Corretto 21
You can uninstall Amazon Corretto 21 by using the following command:
**Example**
```
sudo yum remove java-21-amazon-corretto-devel
```
## Install Amazon Corretto 21 on Alpine Linux
### Using Alpine Package Manager
To use Corretto Alpine repositories with the Alpine package manager import the Corretto public key and then add the repository to the system list. For most systems, you must run the following commands:
**Example**
```
wget -O /etc/apk/keys/amazoncorretto.rsa.pub https://apk.corretto.aws/amazoncorretto.rsa.pub
echo "https://apk.corretto.aws/" >> /etc/apk/repositories
apk update
```
After the repository is added, you can install Corretto 21 by running this command:
**Example**
```
apk add amazon-corretto-21
```
### Uninstall Amazon Corretto 21
You can uninstall Amazon Corretto 21 by using the following
Uninstall JDK:
**Example**
```
apk del amazon-corretto-21
```