https://www.thegeekstuff.com/2010/09/change-timezone-in-linux/

Your boot partition is on a disk using the GPT partitioning scheme but this machine…

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec_configuring_host_names_using_hostnamectl hostnamectl set-hostname oud12.appsdba.info hostnamectl status