#!/bin/bash

function process_debian()
{
    ## Update repos
    apt-get update

    ## Upgrade packages
    apt-get upgrade --with-new-pkgs -y

    ## Remove unused packages
    apt autoremove

    ## Remove old cached packages
    apt autoclean
}

function process_rhel()
{
    ## Clean cache
    yum clean all

    ## Update all packages, skipping problematic dependencies
    yum update --skip-broken
}

function process_fedora()
{
    ## Update Fedora release
    dnf upgrade --refresh
}

if [ -n "$(command -v apt-get)" ]; then
    process_debian
elif [ -n "$(command -v yum)" ]; then
    process_rhel
elif [ -n "$(command -v dnf)" ]; then
    process_fedora
else
    echo "Package manager not found!"
fi