# Install Amazon ParallelCluster as a standalone application
<a name="install-v3-install-standalone"></a>

Install Amazon ParallelCluster as a standalone application on your environment. Follow the instructions for installing Amazon ParallelCluster on an available OS in the following section.

**Prerequisites**
+ An environment with an operating system compatible with an available version of the installer.
**Note**  
 Amazon ParallelCluster requires NodeJS. Amazon ParallelCluster Installer includes a bundled version of NodeJS (v18), which is installed if it does not already exist. If your system is not compatible with NodeJS v18, you should install NodeJS before installing Amazon ParallelCluster. 

## Linux
<a name="collapsible-linux"></a>

------
#### [ Linux x86 (64-bit) ]

**Install Amazon ParallelCluster on your environment.**

1. Download the latest [ pcluster installer](https://us-east-1-aws-parallelcluster.s3.amazonaws.com/parallelcluster/3.15.0/installer/pcluster-installer-bundle-3.15.0.1444-node-v22.22.0-Linux_x86_64-signed.zip) ([ checksum](https://us-east-1-aws-parallelcluster.s3.amazonaws.com/parallelcluster/3.15.0/installer/pcluster-installer-bundle-3.15.0.1444-node-v22.22.0-Linux_x86_64-signed.zip-sha256sum)).

1. Unzip the installer bundle and install Amazon ParallelCluster by using the following commands:

   ```
   $ unzip pcluster-installer-bundle-{{<VERSION>}}-Linux_x86_64-signed.zip -d pcluster-installer-bundle
   $ cd pcluster-installer-bundle
   $ chmod +x install_pcluster.sh
   ```

1. Run the following install script.

   ```
   $ bash install_pcluster.sh
   ```

1. Verify that Amazon ParallelCluster is installed correctly.

   ```
   $ pcluster version
   {
       "version": "3.15.0"
   }
   ```

**Troubleshooting `pcluster` installation errors**
+ If the Amazon ParallelCluster version isn't returned in step 4, restart the terminal or `source` the `bash_profile` to update the `PATH` variable to include the new binary directory as shown in the following example:

  ```
  $ source ~/.bash_profile
  ```
+ If you use your `pcluster` installation to create clusters with `CustomActions` specified as HTTPS resources, rather than S3 URIs, you might see a `WARNING` message indicating that these resources might not be verified ([`SSL: CERTIFICATE_VERIFY_FAILED`]). This is caused by a known issue and you can ignore this warning if you trust the authenticity of the specified resources.

------

**Previous installer bundle versions**
+ None