#!/bin/bash

# A script to change the current username

# Get current username
printf "\nType the current username:\n"
read old

# Set desired username
printf "\nType the desired username:\n"
read new

# Home paths
ohp="home/$old"
nhp="home/$new"

# Change username
printf "\nChanging username\n"

for file in group gshadow passwd shadow subgid subuid
do
    sed -i "s/$old/$new/g" /etc/$file*
done

# Rename home folder
mv /$ohp /$nhp

# Fix path references in /home for new user
printf "\nAdjusting paths in home directory\n"

grep -rl "$ohp" /$nhp | xargs sed -i "s+$ohp+$nhp+g"

# Set user info
echo
chfn $new
sync

reboot