#!/bin/bash

# Read the server list from a file
servers_file="servers.conf"
if [ ! -f "$servers_file" ]; then
    echo "Error: $servers_file does not exist."
    exit 1
fi
servers=($(cat "$servers_file"))

# SSH username for remote access
user=root

# Function to check for updates on a remote server
check_updates () {
    ssh $user@$1 "apt-get update > /dev/null && apt list --upgradable"
}

# Function to update a remote server
update_server () {
    ssh $user@$1 "apt-get update > /dev/null && apt-get upgrade -y" > /dev/null 2>&1
    if [ $? -eq 0 ]; then
        echo "Update successful on $1"
    elif [ -n "$updates" ]; then
        echo "Update failed on $1"
    fi
}

# Loop through servers and check for updates
for server in "${servers[@]}"
do
    echo "Checking for updates on $server"
    updates=$(check_updates $server)
    if [ -n "$updates" ]; then
        echo "Updates available on $server:"
        echo "$updates"
    else
        echo "No updates available on $server"
    fi
done

# Prompt user to confirm update
read -p "Do you want to update these servers? (y/n): " response
if [ "$response" != "y" ]; then
    exit 0
fi

# Loop through servers and update
for server in "${servers[@]}"
do
    echo "Updating $server"
    update_server $server
done

echo "Updates completed"