CentOS 8.3.2011 设置固定IP

谁借莪１个温暖的怀抱￠ 2022-11-06 04:58 165阅读 0赞

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[CentOS 8.3 已正式 GA][CentOS 8.3 _ GA]，是 CentOS Linux 8.X 的最新版本，rebuild 自 RHEL 8.3。

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**镜像下载：[http://mirror.centos.org/centos/8/isos/][http_mirror.centos.org_centos_8_isos]**

对 Yum repo 文件和 repoid 进行了更改，[按照开发团队的解释][Link 1]，主要是为了使 CentOS Stream 作为独立于 CentOS Linux 的发行版运行，以及简化从 CentOS Linux 迁移到 CentOS Stream 的过程。

因此开发团队修改了 /etc/yum.repos.d 目录中某些文件的名字，并更新了 repoid 以进行匹配。具体如下：

<table> 
 <tbody> 
 <tr> 
 <td style="width:554px;"> Repoid (8.2.2004 and before) </td> 
 <td style="width:566px;"> Repoid (8.3.2011 and later) </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> BaseOS </td> 
 <td style="width:566px;"> baseos </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> <a href="https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwiki.centos.org%2FAppStream" rel="nofollow">AppStream</a> </td> 
 <td style="width:566px;"> appstream </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> <a href="https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwiki.centos.org%2FPowerTools" rel="nofollow">PowerTools</a> </td> 
 <td style="width:566px;"> powertools </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> centosplus </td> 
 <td style="width:566px;"> plus </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> <a href="https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwiki.centos.org%2FHighAvailability" rel="nofollow">HighAvailability</a> </td> 
 <td style="width:566px;"> ha </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> base-debuginfo </td> 
 <td style="width:566px;"> debuginfo </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> Devel </td> 
 <td style="width:566px;"> devel </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> BaseOS-source </td> 
 <td style="width:566px;"> baseos-source </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> <a href="https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Fwiki.centos.org%2FAppStream" rel="nofollow">AppStream</a>-source </td> 
 <td style="width:566px;"> appstream-source </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> centosplus-source </td> 
 <td style="width:566px;"> plus-source </td> 
 </tr> 
 <tr> 
 <td style="width:554px;"> base-debuginfo </td> 
 <td style="width:566px;"> debuginfo </td> 
 </tr> 
 </tbody> 
</table>

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查看NetworkManager服务状态，默认开启：

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查看网卡信息：

![20210308091621846.png][]

修改配置文件 /etc/sysconfig/network-scripts/ifcfg-ens33

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重启网络服务 nmcli connection reload  支持简写（systemctl status network 命令在centos8已经被官方淘汰，不再使用）

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nmcli 命令帮助

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhb2ZlaTA0Mjg_size_16_color_FFFFFF_t_70 3][]

查看某个网卡详细信息（IP，dns，gateway）

nmcli device show ens33  #ens33是网卡名称

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhb2ZlaTA0Mjg_size_16_color_FFFFFF_t_70 4][]

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直接使用nmcli 修改网卡信息操作：  
使用nmcli修改网卡信息，实际上是修改文件/etc/sysconfig/network-scripts/ifcfg-ens33

1）设置ip地址为手动指定

nmcli connection modify ens33 ipv4.method manual  \#对应BOOTPROTO=static  
2）设置ip地址为dhcp自动获取

nmcli connection modify ens33 ipv4.method auto  \#对应BOOTPROTO=dhcp  
3）设置开机自动连接

nmcli connection modify ens33 connection.autoconnect yes \#对应ONBOOT=yes  
nmcli connection modify ens33 connection.autoconnect no  \#对应ONBOOT=no  
4）设置静态ip地址

nmcli connection modify ens33 ipv4.addresses '192.168.2.31'  
5）设置网关

nmcli connection modify ens33 ipv4.gateway '192.168.2.1'  
6）设置dns

nmcli connection modify ens32 ipv4.dns '192.168.2.1'  
使网卡修改生效操作：  
1）重新加载ifcfg-ens33配置文件

nmcli connection reload            \#修改配置文件必须要reload一下  
2）不重启系统，让网卡生效的3种方法

方法1：nmcli connection up ens33 （推荐）  
方法2：nmcli device connect ens33  
方法3：nmcli device reapply ens33

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如果提示

Connection 'ens33' is not available on device ens33 because device is strictly unmanaged

原因是由于 NM托管未开启

查看托管状态

nmcli n

显示 disabled 为未开启

开启 托管

nmcli n on

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[96596493f3ace5297c4c9e0d1c185041.png]: /images/20221023/e7c906f9d4ef47e7bef539b822295a06.png
[CentOS 8.3 _ GA]: https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Flists.centos.org%2Fpipermail%2Fcentos-announce%2F2020-December%2F035874.html
[eb19a02b39a37b03112fcf736d7f5b32.png]: /images/20221023/4e3e30d8e5974fdaae7724401d2c5c6e.png
[http_mirror.centos.org_centos_8_isos]: https://www.oschina.net/action/GoToLink?url=http%3A%2F%2Fmirror.centos.org%2Fcentos%2F8%2Fisos%2F
[Link 1]: https://www.oschina.net/action/GoToLink?url=https%3A%2F%2Flists.centos.org%2Fpipermail%2Fcentos-devel%2F2020-September%2F056069.html
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[20210308091621846.png]: /images/20221023/7fefbaf1c39d44c1b35c0f01adc6b3ee.png
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dhb2ZlaTA0Mjg_size_16_color_FFFFFF_t_70 4]: /images/20221023/90d077073d7c41b8bd07aa8a97194886.png
[20210421075725380.png]: /images/20221023/9485118860c549ccad7e75d8431d5008.png