ubuntu apt-get update 失败解决

当运行apt-get update后出现如下错误时:
出现了某些故障(-5 - 没有与主机名关联的地址)
E: Some index files failed to download, they have been ignored, or old ones used instead.
可以将目录下/var/lib/apt/lists/partial/所有的文件清掉,再次运行apt-get update即可!
如果还有问题,请检查resolvconf服务的配置文件: /etc/resolvconf/resolv.conf.d/base , 很可能是DNS的问题,可以使用公共的dns地址:
nameserver 8.8.8.8
nameserver 4.2.2.2

Ubuntu12.04自带源在大陆不好。可以更换其他源:
如果是其它ubuntu版本,只需把precise改为相应的版本的名字。hardy(8.04),lucid(10.04),maverick(10.10),oneiric(11.10),quantal(12.10),precise(12.04) trusty(14.04)
/etc/apt/sources.list

163

deb http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/precise-backports main restricted universe multiverse

sohu

deb http://mirrors.sohu.com/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precisec-security main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse

ustc

deb http://mirrors.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-proposed main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

当你在Ubuntu系统中尝试通过`apt-get update`命令更新软件包列表时,可能会遇到各种错误。以下是几种常见的解决方案: 1. 网络连接问题:首先检查网络连接是否正常,如果无法联网,可以试着重启路由器或使用`sudo apt-get -y install net-tools`安装必要的网络工具。 2. DNS解析失败:如果DNS服务器出现问题,可以尝试更换其他DNS服务器,例如Google公共DNS (`8.8.8.8` 或 `8.8.4.4`)。运行命令 `sudo nano /etc/resolv.conf`,添加新的DNS条目。 3. APT源的问题:确认`sources.list`文件里的源地址是否有效。有时更新源可能是由于源已过期或者地址失效。可以尝试更新源列表,如使用国内的阿里云源(替换`ppa:`后的内容): ``` sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak sudo nano /etc/apt/sources.list ``` 4. GPG密钥问题:更新过程中可能需要GPG密钥,如果提示缺少密钥,你可以手动从官方仓库获取,或者按照提示操作: ```bash sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys [KEY_ID] ``` 5. 清理旧版本文件:有时候清理 `/var/lib/apt/lists/` 目录里的旧日志文件也能解决问题,但需谨慎操作: ```bash sudo rm -rf /var/lib/apt/lists/* ``` 6. 检查磁盘空间:确保有足够的存储空间用于缓存更新数据。如果空间不足,清理一些不必要的文件或增加磁盘空间。 如果你已经尝试了以上步骤还是无法解决问题,记得提供具体的错误信息,以便更准确地定位问题。
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