我正在与一个Debian GNU/Linux 7.5 (wheezy)
当我检查文件时/etc/apt/sources.list该文件有这一行：
# Line commented out by installer because it failed to verify:
#deb http://security.debian.org/ wheezy/updates main
我尝试替换另一个存储库行，但每次替换它并apt-get update在一段时间后运行命令时，我得到：
E: Some index files failed to download. They have been ignored, or old ones used instead.
我应该怎么做才能解决这个问题？