# About this guide This guide describes how to upgrade or downgrade Conductor Live and worker nodes in an Conductor Live cluster. It covers versions 3.25.x and lower. These versions run on RHEL 7 (or CentOS 7). It also covers version 3.26.0 and higher. These versions run on RHEL 9. It applies to the following *upgrade* scenarios: + You are currently running version 3.25.x or lower, and you want to upgrade to a version that is below 3.26.0. + You are currently running version 3.26.0 or higher, and you want to upgrade to a version that is higher than your current version. It applies to the following *downgrade* scenarios: + You are currently running version 3.25.x or lower, and you want to downgrade to a version that is lower than your current version. + You are currently running version 3.26.0 or higher, and you want to downgrade to a different 3.26.x version. If you want to upgrade or downgrade across the 3.25 / 3.26 divide, see the [AWS Elemental Conductor Live Migration Guide](https://docs.aws.amazon.com/elemental-cl3/latest/migrationguide/). **Prerequisite knowledge** We assume that you know how to: + Connect to the Conductor Live web interface using your web browser. + Log in to a remote terminal (Linux) session in order to work via the command line interface. **Note** For assistance with your AWS Elemental appliances and software products, see the [AWS Elemental Support Center](https://console.aws.amazon.com/elemental-appliances-software/home?region=us-east-1#/supportcenter). **Sending Commands** + Unless otherwise stated, enter all Linux shell commands from the home directory (/home/elemental). + To ensure that the commands are executed regardless of your user permissions, use `sudo` to run the command as superuser.