升級LAMP系統可按以下步驟進行：
mysqldump等工具備份數據庫，復制配置文件和網站數據，以防升級出現問題。sudo apt update，CentOS/RHEL系統用sudo yum check-update或sudo dnf check-update。sudo apt upgrade、sudo apt full-upgrade；CentOS/RHEL系統用sudo yum upgrade或sudo dnf upgrade，必要時用sudo apt dist-upgrade處理依賴關系。sudo apt install --only-upgrade apache2升級Apache，用sudo apt install --only-upgrade mysql-server或sudo apt install --only-upgrade mariadb-server升級數據庫，用sudo apt install --only-upgrade php*升級PHP。sudo systemctl restart apache2重啟Apache，用sudo systemctl restart mysql或sudo systemctl restart mariadb重啟數據庫，若有PHP-FPM，用sudo systemctl restart php*-fp重啟。apache2ctl -v、mysql --version、php -v等命令檢查各組件版本，確認升級成功。
