Dell-Omnia-Clusters-HPC-AI/docs/PreRequisites/Login_Node_Security_PreReqs.md

Pre-requisites Before Enabling Security: Login Node

• Verify that the login node host name has been set. If not, use the following steps to set it.

  • Set hostname of the login node to hostname.domainname format using the below command: hostnamectl set-hostname <hostname>.<domainname> >>Eg: hostnamectl set-hostname login-node.omnia.test
  • Add the set hostname in /etc/hosts using vi editor.

  vi /etc/hosts

  • Add the IP of the login node with the above hostname using hostnamectl command in last line of the file.
    

  Eg: xx.xx.xx.xx

Note:

• The Hostname should not contain the following characters: , (comma), . (period) or _ (underscore). However, the domain name is allowed commas and periods.
• The Hostname cannot start or end with a hyphen (-).
• No upper case characters are allowed in the hostname.
• The hostname cannot start with a number.