我正在尝试在 Ubuntu 9.04 Jaunty 上gcc使用下载apt-get install，但是当 apt-get 尝试下载文件时，我收到一个错误：
WARNING: The following packages cannot be authenticated!
libc6 libc6-i686 binutils libgomp1 gcc-4.3 gcc linux-libc-dev libc6-dev Install these packages without verification [y/N]? y
Err http://mt.archive.ubuntu.com jaunty-updates/main libc6 2.9-4ubuntu6.3 404 Not Found [IP: 91.189.88.30 80]
Err http://mt.archive.ubuntu.com jaunty/main binutils 2.19.1-0ubuntu3 404 Not Found [IP: 91.189.88.30 80]
Err http://mt.archive.ubuntu.com jaunty/main libgomp1 4.3.3-5ubuntu4 404 Not Found [IP: 91.189.88.30 80]
Err http://mt.archive.ubuntu.com jaunty/main gcc-4.3 4.3.3-5ubuntu4 404 Not Found [IP: 91.189.88.30 80]
Err http://mt.archive.ubuntu.com …