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hostnamectl set-hostname "new_hostname"
hostnamectl (or hostname) to check new settings
Lazy Lizard
hostnamectl set-hostname "new_hostname"
hostnamectl (or hostname) to check new settingssudo nano /etc/hostname
sudo nano /etc/hosts
sudo reboot# login as root and make sure that there are no active processes for user
usermod -l NEW_USERNAME OLD_USERNAME
# if user is running kill user w the following command
userUID=$(id -u OLD_USERNAME) && pkill -U $userUIDFIRST GIVE ROOT PERMISSION
sudo su
gedit /etc/hosts
gedit /etc/hostname