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上海i9笔记本虚拟机上遇到的,虚拟机是100网段的,当时网关设置的192.168.100.2,ping100网段能ping通,ping140网段也能ping通,ping baidu就ping不通了,不知咋回事,记录一下
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文章目录
- Ubuntu虚拟机ping外网提示:Temporary failure in name resolution
- 1. 错误简介
- 2. 检查和修复/etc/resolv.conf
- 3. 检查网络连接
- 4. 使用其他工具进行故障排除
- 结论
Ubuntu虚拟机ping外网提示:Temporary failure in name resolution
在本文中,我们将讨论在Ubuntu虚拟机中ping外网时出现的"Temporary failure in name resolution"错误,并提供多种可能的解决方法。这个问题通常是由于DNS配置问题或网络连接问题引起的。
1. 错误简介
“Temporary failure in name resolution”是一个相对常见的网络问题,它表明系统无法解析给定的主机名。这可能是因为DNS服务器未能成功解析主机名,或者系统的网络设置有误。
ping: google: Temporary failure in name resolution
在Linux系统中,/etc/resolv.conf
文件用于定义DNS解析器信息。如果这个文件不存在、配置不正确或没有指向正确的DNS服务器,就可能会遇到此类问题。
2. 检查和修复/etc/resolv.conf
首先,需要检查 /etc/resolv.conf
文件。该文件应包含至少一个 nameserver
行,指向可用的DNS服务器。
cat /etc/resolv.conf
如果该文件为空或者没有 nameserver
行,可以添加一个公共DNS服务器,如Google DNS:
echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf
请注意,如果你正在使用某些特定的网络管理工具(如 NetworkManager 或 systemd-resolved),你可能需要通过这些工具来修改DNS设置,而不是直接编辑 /etc/resolv.conf
。
比如,在我们ubuntu Nvidia盒子里,我用networkd作为netplan修改ip的后端,/etc/resolv.conf
是一个软链接:
3. 检查网络连接
确保Ubuntu虚拟机的网络连接已经正确配置并处于活动状态。
你可以使用 ip link
命令来查看网络接口的状态:
ip link
如果你的网络接口未启用(即状态为DOWN),你可以使用 ip link set dev <interface> up
命令来启用它:
sudo ip link set dev eth0 up
你也可以使用 ping
命令来检查网络连接是否正常:
ping 8.8.8.8
如果你无法ping通8.8.8.8,那么问题可能与你的网络连接有关。
4. 使用其他工具进行故障排除
你还可以使用诸如 dig
或 nslookup
这样的工具来进一步测试DNS解析:
dig google
nslookup google
这些工具可以帮助你确定问题是否仅限于 ping
命令,或者是否是更广泛的DNS解析问题。
结论
总的来说,处理 “Temporary failure in name resolution” 错误通常涉及到检查和修复 /etc/resolv.conf
文件以及确保网络连接正常。同时,使用 dig
或 nslookup
这样的工具可以帮助你更深入地了解问题所在。
参考资料:
- Understanding the DNS ‘Temporary failure in name resolution’ error
- How to Fix ‘Temporary Failure in Name Resolution’ Error in Linux
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