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      "text": "vi /etc/sysconfig/network-scripts/ifcfg-enp0s3 # 不同的网卡名臣可能不同",
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  "contentMarkdown": "# 【OS Unix-like】CentOS 7 网络配置\n\n> [!danger] 已停止维护的历史配置\n> CentOS Linux 7 已于 2024-06-30 停止维护，不再获得常规安全更新。本文仅用于维护遗留环境；新部署应使用仍在支持期内的发行版，并以其当前网络管理文档为准。迁移步骤见 [[受支持Linux发行版的部署迁移检查清单]]。\n\n> 创建时间：2022/1/4 19:41\n\n[l蓝色梦幻](https://www.jianshu.com/u/abd3db9d23a6)\n\n2018.10.22 13:46:12字数 528阅读 5,504\n\nMinimal 版本的 CentOS 7 安装完成后, 如果没有在安装过程中配置网络,那么安装成功后的系统是没有网络访问的.这是因为默认情况下,没有配置对应的 IP 以及 DNS 等导致的问题.此外,大部分 CentOS 是作为服务器存在的.为了方便使用,建议为 CentOS 配置静态 IP。\n\n  1. 配置 CentOS 7 访问到网络.\n\nCentOS 安装成功后,进行一下 ping 的操作,验证网络是否联通.\n\n& ping 10.1.1.1\n\n![](assets/2159939-cf8af88089423af6.PNG)\n\n001.PNG\n\n当出现网络未联通的情况,我们使用 nmcli 命令查看一下网络设置:\n\nnmcli connection show\n\n![](assets/2159939-8a428f4a4d776f2a.PNG)\n\n002.PNG\n\n该命令会返回 4 列数据. 分别是 NAME(联网代号), UUID(识别码), TYPE网卡类型, DEVICE(网卡名称).\n\n查看指定网卡的信息:\n\n`nmcli connection show 联网代号`\n\n![](assets/2159939-91b15a2941d6f7f7.PNG)\n\n003.PNG\n\n这时候我们找到原因了. IP 和 DNS 配置都不正确.\n\n设置网络获取方式为自动获取 IP. 一般至此, 硬件连接成功的话都会连接到互联网上.\n\nnmcli connection modify 联网代号 connection.autoconnect yes ipv4.method auto\n\n![](assets/2159939-040ebf4f38c5a032.PNG)\n\n004.PNG\n\n  1. 安装 ifconfig 工具\n\nCentOS 7 中使用 ip 命令代替了 ifconfig 命令, 如果你不习惯 ip 命令，可以将其安装回来.\n\n## yum install net-tools\n\n  2. 设置为固定 ip.\n\n修改网卡配置文件：\n\n## vi /etc/sysconfig/network-scripts/ifcfg-enp0s3 # 不同的网卡名臣可能不同\n\n已经配置为动态获取 ip 的配置:\n\n006.PNG\n\n修改以下两个地方。注意：ip dns 等信息请于 ISP 处获取。\n\n    * IPADDR = \"[在这里输入你的静态 IP]\"\n\n    * GATEWAY = \"[输入你的默认网关]\"\n\n    * NETMASK = \"[输入你的网关]\"\n\n    * DNS1 = \"[你的 DNS]\"\n\n    * DNS2 = \"[你的 DNS]\"\n\n  3. 007.PNG\n\n使网卡配置生效\n\n  4. nmcli connection up ens33\n\n重启网络服务。后查看 ip 是否与分配的相同。\n\n  5. # service network restart\n\n## ip addr show\n\n  6. 008.PNG\n\nping 以下网络，检查网络连接状态。\n\n  7. # ping -c4 www.baidu.com\n\nMeasure\n\nMeasure\n"
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