# LINUX Prerequisites
<a name="ex-migrate-prereqs-linux"></a>

Observe the requirements listed in [Migrating Workloads: Prerequisites for Linux and Windows](ex-migrate-instance-prereqs.md) and ensure the following before submitting a WIGS RFC:
+ The latest enhanced networking drivers are installed; see [Enhanced Networking on Linux](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking.html).
+ Third-party software components that will conflict with AMS components have been removed:
  + Anti-virus Clients
  + Backup Clients
  + Virtualization software (such as VM Tools or Hyper-V Integration services)
  + Access Management Software (Such as SSSD, Centrify, or PBIS)
+ Ensure SSH is properly configured - This temporarily enables private key authentication for SSH. AMS uses this with our configuration management tool. Use these commands:

  ```
  sudo grep -q "^PubkeyAuthentication" /etc/ssh/sshd_config && sudo sed "s/^PubkeyAuthentication=.*/PubkeyAuthentication yes/" -i /etc/ssh/sshd_config || sudo sed "$ a\PubkeyAuthentication yes" -i /etc/ssh/sshd_config
  ```

  ```
  sudo grep -q "^AuthorizedKeysFile" /etc/ssh/sshd_config && sudo sed "s/^AuthorizedKeysFile=.*/AuthorizedKeysFile %h\/.ssh\/authorized_keys/" -i /etc/ssh/sshd_config || sudo sed "$ a\AuthorizedKeysFile %h/.ssh/authorized_keys" -i /etc/ssh/sshd_config
  ```
+ Ensure Yum is properly configured - RedHat requires licensing to use their Yum Repositories. The instance needs to be licensed via a Satellite Server or RedHat Cloud Server. Use one of these links if licensing is needed:
  + [Red Hat Satellite](https://www.redhat.com/en/technologies/management/satellite)
  + [Red Hat Cloud Access](https://www.redhat.com/en/technologies/cloud-computing/cloud-access)
+ If you use Red Hat Satellite, WIGS requires the addition of Red Hat Software Collections (RHSCL). The WIGS system uses RHSCL to add a Python3.6 interpreter alongside whatever is configured on the system. To support this solution, the following repositories must be available:
  + rhel-server-rhscl
  + rhel-server-releases-optional