systemd-first-boot-script/scripts/50-hostname

#!/bin/bash
# Licence : GPL v3
# Author: Laurent HUBERT
#
# Example file for first-boot-script
# Copy this file to a new file and add permission execution to the new file
# Example:
# # cp skeleton 02-myscript
# # chmod +x 02-myscript
#
cat <<EOF
##############################
# Changing hostname          #
##############################
EOF
# Example Section : asking user to enter a value
read -p "Please enter new hostname: " answer

if [ -n "$answer" ]
then
  echo Changing hostname to $answer
  current=$(hostname)
  sed -i.firstboot.backup s/$current/$answer/g /etc/hostname
  sed -i.firstboot.backup s/$current/$answer/g /etc/hosts
  exit 0
else
  # Exit with non zero status
  exit 1
fi