centos7网络配置与之前版本有什么不同?
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>由于Centos7的网络配置与之前版本有较大差距，所以单独讨论。</p>
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Centos7对网卡设备具有自动探测功能：</p>
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<strong>(1)网卡命名机制</strong></p>
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systemd对网络设备的命名方式：</p>
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(a)如果Firmware或BIOS为主板上集成的设备提供的索引信息可用，且可预测则根据此索引进行命名，例如eno1；</p>
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(b)如果Firmware或BIOS为PCI-E扩展槽所提供的索引信息可用，且可预测，则根据此索引进行命名，例如ens1;</p>
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(c)如果硬件接口的物理位置信息可用，则根据此信息进行命名，例如enp2s0；</p>
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(d)如果用户显式启动，也可根据MAC地址进行命名，enx2387a1dc56;</p>
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(e)上述均不可用时，则使用传统命名机制；</p>
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上述命名机制中，有的需要biosdevname程序的参与；</p>
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<strong>(2)名称组成格式</strong></p>
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en:ethernet以太网</p>
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wl:wlan无线局域网</p>
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ww:wwan无线广域网</p>
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名称类型：</p>
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o<index>:集成设备的设备索引号；</p>
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s<slot>:扩展槽的索引号；</p>
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x<MAC>:基于MAC地址的命名；</p>
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p<bus>s<slot>:enp2s1</p>
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<strong>网卡设备的命名过程：</strong></p>
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第一步：</p>
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udev,辅助工具程序/lib/udev/rename_device,/usr/lib/udev/rules.d/60-net.rules</p>
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读取配置文件</p>
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第二步：</p>
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biosdevname会根据/usr/lib/udev/rules.d/71-biosdevname.rules</p>
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第三步：</p>
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通过检测网络接口设备，根据/usr/lib/udev/rules.d/75-net-description</p>
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ID_NET_NAME_ONBOARD,ID_NET_NAME_SLOT,ID_NET_NAME_PATH</p>
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<strong>回归传统命名方式：</strong></p>
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(1)编辑/etc/default/grub配置文件</p>
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GRUB_CMDLINE_LINUX="net.ifnames=0rhgbquiet"</p>
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(2)为grub2生成其配置文件</p>
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grub2-mkconfig-o/etc/grub2.cfg</p>
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(3)重启系统</p>
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地址配置工具：nmcli:</p>
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显示网络信息：nmclideviceshow</p>
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nmclicon{show|up|down|add|modify|edit|delete|reload|load}</p>
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<strong>如何修改IP地址等属性：</strong></p>
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#nmcliconnectionmodify接口名[+|-]setting.propertyvalue</p>
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setting.property:</p>
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ipv4.addresses</p>
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ipv4.gateway</p>
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ipv4.dns1</p>
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ipv4.method</p>
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manual</p>
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网络接口配置tui工具：nmtui</p>
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<img style="max-width:100%!important;height:auto!important;"title="centos7网络配置与之前版本有什么不同?" alt="centos7网络配置与之前版本有什么不同?" src="https://zhuji.jb51.net/uploads/img/202305/9b5325e1f661107dd0d9dea30189333d.jpg"></p>
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主机名称配置工具：hostnamectl</p>
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status</p>
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set-hostname</p>
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