ubuntu 安装 ptf E: Unable to locate package vsftp

 vi  /etc/apt/sources.list

把下面这段话复制，加在该文件最下面，保存

deb http://mirrors.163.com/debian lenny main non-free contrib

deb http://mirrors.163.com/debian lenny-proposed-updates main contrib non-free

deb http://mirrors.163.com/debian-security lenny/updates main contrib non-free

deb-src http://mirrors.163.com/debian lenny main non-free contrib

deb-src http://mirrors.163.com/debian lenny-proposed-updates main contrib non-free

deb-src http://mirrors.163.com/debian-security lenny/updates main contrib non-free

输入sudo rm /var/lib/apt/lists/lock 强制把/var/lib/apt/lists/lock删掉。 之后就能apt-get update了