升級過程也很簡單，以前的系統是 Ubuntu 7.04，步驟如下：1、首先 sudo sed -i 's/feisty/gutsy/' /etc/apt/sources.list當然你可以打開 /etc/apt/sources.list，刪除或注釋掉所有內容，加入下面幾段（推薦使用 Ubuntu 官方源）：deb http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ gutsy-proposed main restricted universe multiversedeb http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ gutsy main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ gutsy-security main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ gutsy-updates main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ gutsy-proposed main restricted universe multiversedeb-src http://archive.ubuntu.com/ubuntu/ gutsy-backports main restricted universe multiverse2、然后 sudo apt-get update3、接著 sudo apt-get dist-upgrade等待 2、3 個小時左右，更新完成。運氣還比較好，整個過程中沒有遇到一點麻煩。升級完成后建議執行一下 sudo apt-get autoremove 和 sudo apt-get clean 釋放空間。