new_user.sh

#!/bin/bash

# Configuration
NEW_USER="MY_NEW_USER"
PASSWORD="MY_PASSWORD"

# 1. Update system
apt update && apt upgrade -y

# 2. Install Sudo and OpenSSH Server
apt install sudo openssh-server -y

# 3. Create user and add to sudo group
# -m creates the home directory, -s sets the shell
useradd -m -s /bin/bash "$NEW_USER"
echo "$NEW_USER:$PASSWORD" | chpasswd
usermod -aG sudo "$NEW_USER"

# 4. Enable and start SSH
systemctl enable ssh
systemctl start ssh

# 5. Basic SSH Security (Optional but recommended)
# This allows the new user to login via SSH
sed -i 's/^#PermitRootLogin.*/PermitRootLogin no/' /etc/ssh/sshd_config
sed -i 's/^#PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config

# Restart SSH to apply changes
systemctl restart ssh

echo "Setup complete! User '$NEW_USER' created with sudo access."