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enhancemen
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27237a866b |
223
setup.sh
223
setup.sh
@ -1,28 +1,23 @@
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#!/bin/bash
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#
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# Script to perform system maintenance on a RHEL-based Linux system.
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#
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# This script:
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# - Updates package manager and installed packages
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# - Sets the system timezone based on geolocation or user input
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# - Changes the system hostname and updates /etc/hosts
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# - Creates a limited user account and modifies SSH settings
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# - Optionally installs Docker CE
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#
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# Prerequisites:
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# - The script must be run as root or with sudo privileges
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#
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# Usage:
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# - Run the script directly on the system or via SSH.
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# - Respond to prompts as required during the script execution.
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# Script to update a RHEL-based Linux system, set the timezone, change the hostname,
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# add a limited user account, modify sshd_config settings, and optionally install Docker CE
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# Variables
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timezone="America/New_York"
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sshd_config="/etc/ssh/sshd_config"
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docker_installed=false
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# Function to prompt for hostname
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# Function to prompt for hostname with validation
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prompt_for_hostname() {
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while true; do
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read -p "Please enter the desired hostname: " hostname
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if [[ -z "$hostname" ]]; then
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echo "Hostname cannot be empty. Please try again."
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else
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break
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fi
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done
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}
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# Function to add hostname and IP to /etc/hosts
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@ -41,22 +36,33 @@ update_hosts_file() {
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fi
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}
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# Function to prompt for Docker installation
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# Function to prompt for Docker installation with validation
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prompt_for_docker_install() {
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while true; do
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read -p "Would you like to install Docker CE? (y/n): " install_docker
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if [[ "$install_docker" =~ ^[Yy]$ ]]; then
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install_docker
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else
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echo "Skipping Docker installation."
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fi
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case "$install_docker" in
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[Yy]*) install_docker ;;
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[Nn]*) echo "Skipping Docker installation."; break ;;
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*) echo "Invalid input. Please enter 'y' or 'n'." ;;
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esac
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done
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}
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# Function to install Docker
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install_docker() {
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echo "Installing Docker CE..."
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curl -fsSL https://get.docker.com -o get-docker.sh
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if [ $? -ne 0 ]; then
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echo "Error downloading Docker installation script."
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exit 1
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fi
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sh get-docker.sh
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if [ $? -ne 0 ]; then
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echo "Error installing Docker."
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exit 1
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fi
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# Start and enable Docker service
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systemctl start docker
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systemctl enable docker
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@ -64,23 +70,21 @@ install_docker() {
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usermod -aG docker "$username"
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echo "User $username added to the docker group."
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# Clean up get-docker.sh
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rm -f get-docker.sh
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}
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# Function to create a limited user account
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# Function to create a limited user account with validation
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create_user_account() {
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while true; do
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read -p "Please enter the username for the new user account: " username
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if [[ -z "$username" ]]; then
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echo "Username cannot be empty. Please try again."
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else
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break
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fi
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done
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read -sp "Please enter the password for the new user account: " password
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echo
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read -sp "Please confirm the password: " password_confirm
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echo
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if [ "$password" != "$password_confirm" ]; then
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echo "Passwords do not match. Exiting."
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exit 1
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fi
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# Create the user and add to the wheel group
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if id "$username" &>/dev/null; then
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@ -92,13 +96,16 @@ create_user_account() {
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fi
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}
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# Check if the script is run as root
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# Function to check if running as root
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check_root() {
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if [ "$(id -u)" -ne 0 ]; then
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echo "This script must be run as root. Please use sudo or switch to root."
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exit 1
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fi
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}
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# Update the package manager
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# Function to update package manager cache
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update_package_manager() {
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echo "Updating package manager..."
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if command -v dnf &> /dev/null; then
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dnf -y makecache
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@ -108,112 +115,37 @@ else
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echo "Neither dnf nor yum found. This script only works on RHEL-based distributions."
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exit 1
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fi
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}
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# Upgrade installed packages
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# Function to upgrade installed packages
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upgrade_packages() {
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echo "Upgrading installed packages..."
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if command -v dnf &> /dev/null; then
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dnf -y upgrade
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elif command -v yum &> /dev/null; then
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yum -y update
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fi
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# Change the timezone
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# Function to set the timezone to UTC in case of an error
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set_utc_timezone() {
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echo "Error occurred while determining the timezone. Falling back to UTC."
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timedatectl set-timezone UTC
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}
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# Function to get the timezone from the ipinfo.io API
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get_timezone_from_api() {
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# Fetch geolocation information using the ipinfo.io API
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response=$(curl -s https://ipinfo.io)
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# Check if the curl command succeeded and the response contains the 'timezone' field
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if [ $? -eq 0 ] && echo "$response" | grep -q "timezone"; then
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# Extract the timezone directly from the JSON response
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timezone=$(echo "$response" | jq -r '.timezone')
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echo "Detected timezone: $timezone"
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return 0
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else
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set_utc_timezone
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return 1
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fi
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# Function to change the timezone
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set_timezone() {
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echo "Setting timezone to $timezone..."
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timedatectl set-timezone "$timezone"
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}
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# Function to prompt the user to choose a timezone
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prompt_for_timezone() {
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echo ""
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echo "Choose a timezone option:"
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echo "1) Use the detected timezone ($1)"
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echo "2) Use UTC"
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echo "3) Enter a custom timezone"
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# Read user choice
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read -p "Enter the number corresponding to your choice: " choice
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case "$choice" in
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1)
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echo "You chose to use the detected timezone: $1"
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timedatectl set-timezone "$1"
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;;
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2)
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echo "You chose to use UTC."
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timedatectl set-timezone UTC
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;;
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3)
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# Ask for a custom timezone
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read -p "Enter your preferred timezone (e.g., Europe/London, America/New_York): " custom_timezone
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if timedatectl list-timezones | grep -q "$custom_timezone"; then
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timedatectl set-timezone "$custom_timezone"
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else
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echo "Invalid timezone. Falling back to UTC."
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timedatectl set-timezone UTC
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fi
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;;
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*)
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echo "Invalid choice. Falling back to UTC."
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timedatectl set-timezone UTC
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;;
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esac
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}
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# Main script execution starts here
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echo "Attempting to detect and set the timezone..."
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# Try to get the detected timezone from the API
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if get_timezone_from_api; then
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# If the timezone was successfully detected, prompt the user for their choice
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prompt_for_timezone "$timezone"
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else
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# If no timezone was detected, ask the user to fall back to UTC
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echo "Unable to detect timezone. Falling back to UTC."
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timedatectl set-timezone UTC
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fi
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# Change the hostname
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# Function to change the hostname
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set_hostname() {
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prompt_for_hostname
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echo "Setting hostname to $hostname..."
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hostnamectl set-hostname "$hostname"
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}
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# Update /etc/hosts
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update_hosts_file
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# Create a limited user account
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create_user_account
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# Modify sshd_config
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# Function to modify sshd_config
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modify_sshd_config() {
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echo "Modifying SSH configuration..."
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if [ -f "$sshd_config" ]; then
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# Set PermitRootLogin to no
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if ! grep -q "^PermitRootLogin" "$sshd_config"; then
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echo "PermitRootLogin no" >> "$sshd_config"
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else
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sed -i 's/^PermitRootLogin.*/PermitRootLogin no/' "$sshd_config"
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fi
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sed -i 's/^PermitRootLogin .*/PermitRootLogin no/' "$sshd_config" || echo "PermitRootLogin no" >> "$sshd_config"
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# Set PasswordAuthentication to no
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if grep -q '^#PasswordAuthentication' "$sshd_config"; then
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@ -232,15 +164,16 @@ else
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echo "sshd_config file not found. Exiting."
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exit 1
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fi
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}
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# Get the IP address of the machine
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ip_address=$(hostname -I | awk '{print $1}')
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# Function to restart SSH service
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restart_ssh() {
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echo "Restarting SSH service..."
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systemctl restart sshd
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}
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# Prompt the user to copy their public key
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echo "Please copy your public SSH key to the server using the following command:"
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echo "ssh-copy-id $username@$ip_address"
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# Wait until the authorized_keys file is no longer empty
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# Function to wait for SSH key copy
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wait_for_key_copy() {
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echo "Waiting for your public key to be copied..."
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while true; do
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if [ -s "/home/$username/.ssh/authorized_keys" ]; then
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@ -249,20 +182,30 @@ while true; do
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fi
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sleep 2
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done
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}
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# Restart SSH service to apply changes
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echo "Restarting SSH service..."
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systemctl restart sshd
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# Prompt for Docker installation
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prompt_for_docker_install
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# Clean up
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# Function to clean up unused packages
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cleanup() {
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echo "Cleaning up..."
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if command -v dnf &> /dev/null; then
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dnf -y autoremove
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elif command -v yum &> /dev/null; then
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yum -y autoremove
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fi
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}
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echo "System update complete! Timezone set to ${timezone:-UTC}, hostname set to $hostname, limited user created, sshd_config modified, and Docker installation completed if selected."
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# Main execution
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check_root
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update_package_manager
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upgrade_packages
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set_timezone
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set_hostname
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update_hosts_file
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create_user_account
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modify_sshd_config
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restart_ssh
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wait_for_key_copy
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prompt_for_docker_install
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cleanup
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echo "System update complete! Timezone set to $timezone, hostname set to $hostname, limited user created, sshd_config modified, and Docker installation completed if selected."
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