update_cent-ubuntu-alpine.sh

#!/bin/bash

TEXT_RESET='\e[0m'
TEXT_YELLOW='\e[0;33m'
TEXT_RED_B='\e[1;31m'

# Detecting the package manager
if command -v apt-get &> /dev/null; then
    # Ubuntu
    PACKAGE_MANAGER='apt-get'
elif command -v dnf &> /dev/null; then
    # CentOS
    PACKAGE_MANAGER='dnf'
elif command -v apk &> /dev/null; then
    # Alpine Linux
    PACKAGE_MANAGER='apk'
else
    echo -e $TEXT_RED_B
    echo "Unsupported Linux distribution."
    echo -e $TEXT_RESET
    exit 1
fi

# Updating the package manager
sudo $PACKAGE_MANAGER update
echo -e $TEXT_YELLOW
echo "${PACKAGE_MANAGER^^} update finished..."
echo -e $TEXT_RESET

# Performing package upgrades
if [ "$PACKAGE_MANAGER" == "apt-get" ]; then
    # Ubuntu
    sudo $PACKAGE_MANAGER dist-upgrade -y
else
    # CentOS and Alpine Linux
    sudo $PACKAGE_MANAGER upgrade -y
fi

echo -e $TEXT_YELLOW
echo "${PACKAGE_MANAGER^^} upgrade finished..."
echo -e $TEXT_RESET

# Cleaning up unused packages
sudo $PACKAGE_MANAGER autoremove -y
echo -e $TEXT_YELLOW
echo "${PACKAGE_MANAGER^^} auto remove finished..."
echo -e $TEXT_RESET

# Performing a release upgrade (if applicable)
if [ "$PACKAGE_MANAGER" == "apt-get" ]; then
    sudo do-release-upgrade
    echo -e $TEXT_YELLOW
    echo 'APT release upgrade finished...'
    echo -e $TEXT_RESET
fi

# Checking for reboot requirement
if [ -f /var/run/reboot-required ]; then
    echo -e $TEXT_RED_B
    echo 'Reboot required!'
    echo -e $TEXT_RESET
fi

echo -e $TEXT_RED_B
echo "Update Complete! Press Y/N to reboot."
echo -e $TEXT_RESET

# Prompting for reboot
while true; do
    read -p "Would you like to reboot now? " yn
    case $yn in
    [Yy]* ) reboot; break;;
    [Nn]* ) exit;;
    * ) echo "Please answer yes or no!";;
    esac
done