archlinux无法联网解决方法

今晚准备在vmware虚拟机上试着装一个archlinux来玩。

根据wiki上面的教程一步一步做下来，只漏掉了网络配置这一个环节。

结果配置完重启archlinux，发现ping www.baidu.com等等的网站皆显示unknown host.

在执行pacman -Syu或者pacman -Syy的时候，提示

[greglee@myhost ~]$ sudo pacman -Syu
:: Synchronizing package databases...
error: failed retrieving file 'core.db' from archlinux.mirrors.ovh.net : Could not resolve host: archlinux.mirrors.ovh.net; Name or service not known
error: failed retrieving file 'core.db' from archlinux.mirror.kangaroot.net : Could not resolve host: archlinux.mirror.kangaroot.net; Name or service not known
error: failed retrieving file 'core.db' from mir.archlinux.fr : Could not resolve host: mir.archlinux.fr; Name or service not known
error: failed retrieving file 'core.db' from ftp.nluug.nl : Could not resolve host: ftp.nluug.nl; Name or service not known
error: failed retrieving file 'core.db' from archlinux.mirror.root.lu : Could not resolve host: archlinux.mirror.root.lu; Name or service not known
error: failed retrieving file 'core.db' from mirror.nl.leaseweb.net : Could not resolve host: mirror.nl.leaseweb.net; Name or service not known
error: failed retrieving file 'core.db' from ftp.halifax.rwth-aachen.de : Could not resolve host: ftp.halifax.rwth-aachen.de; Name or service not known
error: failed retrieving file 'core.db' from mirror.de.leaseweb.net : Could not resolve host: mirror.de.leaseweb.net; Name or service not known
error: failed retrieving file 'core.db' from ftp.uni-kl.de : Could not resolve host: ftp.uni-kl.de; Name or service not known
error: failed retrieving file 'core.db' from archlinux.limun.org : Could not resolve host: archlinux.limun.org; Name or service not known
error: failed to update core (download library error)
error: failed retrieving file 'extra.db' from archlinux.mirrors.ovh.net : Could not resolve host: archlinux.mirrors.ovh.net; Name or service not known
error: failed retrieving file 'extra.db' from archlinux.mirror.kangaroot.net : Could not resolve host: archlinux.mirror.kangaroot.net; Name or service not known
error: failed retrieving file 'extra.db' from mir.archlinux.fr : Could not resolve host: mir.archlinux.fr; Name or service not known
error: failed retrieving file 'extra.db' from ftp.nluug.nl : Could not resolve host: ftp.nluug.nl; Name or service not known
error: failed retrieving file 'extra.db' from archlinux.mirror.root.lu : Could not resolve host: archlinux.mirror.root.lu; Name or service not known
error: failed retrieving file 'extra.db' from mirror.nl.leaseweb.net : Could not resolve host: mirror.nl.leaseweb.net; Name or service not known
error: failed retrieving file 'extra.db' from ftp.halifax.rwth-aachen.de : Could not resolve host: ftp.halifax.rwth-aachen.de; Name or service not known
error: failed retrieving file 'extra.db' from mirror.de.leaseweb.net : Could not resolve host: mirror.de.leaseweb.net; Name or service not known
error: failed retrieving file 'extra.db' from ftp.uni-kl.de : Could not resolve host: ftp.uni-kl.de; Name or service not known
error: failed retrieving file 'extra.db' from archlinux.limun.org : Could not resolve host: archlinux.limun.org; Name or service not known
error: failed to update extra (download library error)
error: failed retrieving file 'community.db' from archlinux.mirrors.ovh.net : Could not resolve host: archlinux.mirrors.ovh.net; Name or service not known
error: failed retrieving file 'community.db' from archlinux.mirror.kangaroot.net : Could not resolve host: archlinux.mirror.kangaroot.net; Name or service not known
error: failed retrieving file 'community.db' from mir.archlinux.fr : Could not resolve host: mir.archlinux.fr; Name or service not known
error: failed retrieving file 'community.db' from ftp.nluug.nl : Could not resolve host: ftp.nluug.nl; Name or service not known
error: failed retrieving file 'community.db' from archlinux.mirror.root.lu : Could not resolve host: archlinux.mirror.root.lu; Name or service not known
error: failed retrieving file 'community.db' from mirror.nl.leaseweb.net : Could not resolve host: mirror.nl.leaseweb.net; Name or service not known
error: failed retrieving file 'community.db' from ftp.halifax.rwth-aachen.de : Could not resolve host: ftp.halifax.rwth-aachen.de; Name or service not known
error: failed retrieving file 'community.db' from mirror.de.leaseweb.net : Could not resolve host: mirror.de.leaseweb.net; Name or service not known
error: failed retrieving file 'community.db' from ftp.uni-kl.de : Could not resolve host: ftp.uni-kl.de; Name or service not known
error: failed retrieving file 'community.db' from archlinux.limun.org : Could not resolve host: archlinux.limun.org; Name or service not known
error: failed to update community (download library error)
error: failed to synchronize any databases
error: failed to init transaction (download library error)

这个问题让我困扰了很久，在网上找了很多的资料，wiki上面的官方解释是ipv6没有禁用，又或者是源不可用，但是经过我的测试，发现其实是网络根本就没有连通导致的。

最终，终于被我找到了一个解决方案。应该是网络没有自动获取IP.

所以，我的解决方法是，

>nano /etc/rc.conf

在这个文件中添加：

>interface = eth0

保存退出之后，敲入命令

>dhcpcd

马上发现一切正常工作了！