#A/ Upgrade "Ubuntu 16.04.LTS.x64" to "Ubuntu 18.04.LTS.x64"
sudo apt-get update -y && sudo apt-get upgrade -y && sudo apt-get dist-upgrade -y && sudo do-release-upgrade
#B/Upgrade Ubuntu 16.04 -> 18.04, Fix lỗi ERROR Curl_Open_SSL cho PHP:
sudo apt-get -y remove --auto-remove libcurl4-openssl-dev && sudo apt-get -y install libcurl3
#C/ Fixed "LetsEncrypt Error":
sudo apt-get -y install libgnutls-openssl27 libgnutls30 ubuntu-advantage-tools
#D/REBOOT OS
#E/ Result: DONE
