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  • CentOS7网络配置

    原文网址:http://blog.csdn.net/cmzsteven/article/details/49777667

    CentOS7中已经取消了ifconfig,用nmcli进行了代替,服务管理也升级为systemd。所以之前在6.x版本上的网络配置操作在7.x上行不通了。 

    下面介绍一下在CentOS7.x上进行网络配置的方法。

    环境准备:新安装的CentOS7.x,最小化安装,没有进行网络配置。
    1、查看当前网卡信息

    [wangdeqiang@localhost ~]$ nmcli connection show
    名称    UUID                                  类型            设备   
    enp0s3  ae1646b6-4867-4aa8-ac04-a45551f0e4ea  802-3-ethernet  enp0s3 
    virbr0  967c8dc2-0a07-46a1-a3bb-b07a5c6ab662  bridge  


    CentOS7中对网上的命名规则有所变更,具体规则如下:

    eno1 :代表由主板 BIOS 內建的网卡
    ens1 :代表由主板 BIOS 內建的 PCI-E 界面的网卡
    enp2s0 :代表 PCI-E 界面的独立网卡,可能有多个网卡接口,因此会有 s0, s1... 的编号
    eth0 :如果上述的名称都不适用,就回到原本的预设网卡编号
    由于现在网卡没有启用,也没有建立相关的配置文件,因此在DEVICE 栏位里显示的是”—”。在配置完成,重启网络服务后就会显示相应的设备名,在我的虚拟机上显示的是“enp0s3”


    2、使用nmcli命令手工配置网卡 
    需要配置的网络信息:

    IP地址:172.20.31.221/24 
    网关:172.20.31.240 
    DNS:202.96.69.38

    命令:

    [wangdeqiang@localhost ~]$ nmcli connection modify enp0s3 
    > connection.autoconnect yes 
    > ipv4.method manual 
    > ipv4.address 172.20.31.221/24 
    > ipv4.gateway 172.20.31.240 
    > ipv4.dns 202.96.64.68


    autoconnect 是设置开机自动连接 
    ipv4.method 是设置手工配置IPV4地址

    重启网络服务

    systemctl restart network
    

    3、查看配置后的网卡配置信息

    [wangdeqiang@localhost ~]$ nmcli connection show enp0s3
    connection.id:                          enp0s3
    connection.uuid:                        ae1646b6-4867-4aa8-ac04-a45551f0e4ea
    connection.stable-id:                   --
    connection.interface-name:              enp0s3
    connection.type:                        802-3-ethernet
    connection.autoconnect:                 yes
    connection.autoconnect-priority:        0
    connection.autoconnect-retries:         -1 (默认)
    connection.timestamp:                   1516626418
    connection.read-only:                   no
    connection.permissions:                 --
    connection.zone:                        --
    connection.master:                      --
    connection.slave-type:                  --
    connection.autoconnect-slaves:          -1 (默认)
    connection.secondaries:                 --
    connection.gateway-ping-timeout:        0
    connection.metered:                     未知
    connection.lldp:                        -1 (default)
    802-3-ethernet.port:                    --
    802-3-ethernet.speed:                   0
    802-3-ethernet.duplex:                  --
    802-3-ethernet.auto-negotiate:          no
    802-3-ethernet.mac-address:             --
    802-3-ethernet.cloned-mac-address:      --
    802-3-ethernet.generate-mac-address-mask:--
    802-3-ethernet.mac-address-blacklist:   --
    802-3-ethernet.mtu:                     自动
    802-3-ethernet.s390-subchannels:        --
    802-3-ethernet.s390-nettype:            --
    802-3-ethernet.s390-options:            --
    802-3-ethernet.wake-on-lan:             1 (default)
    802-3-ethernet.wake-on-lan-password:    --
    ipv4.method:                            manual
    ipv4.dns:                               202.96.64.68
    ipv4.dns-search:                        --
    ipv4.dns-options:                       (默认)
    ipv4.dns-priority:                      0
    ipv4.addresses:                         172.20.31.221/24
    ipv4.gateway:                           172.20.31.240
    ipv4.routes:                            --
    ipv4.route-metric:                      -1
    ipv4.ignore-auto-routes:                no
    ipv4.ignore-auto-dns:                   no
    ipv4.dhcp-client-id:                    --
    ipv4.dhcp-timeout:                      0
    ipv4.dhcp-send-hostname:                yes
    ipv4.dhcp-hostname:                     --
    ipv4.dhcp-fqdn:                         --
    ipv4.never-default:                     no
    ipv4.may-fail:                          yes
    ipv4.dad-timeout:                       -1 (默认)
    ipv6.method:                            auto
    ipv6.dns:                               --
    ipv6.dns-search:                        --
    ipv6.dns-options:                       (默认)
    ipv6.dns-priority:                      0
    ipv6.addresses:                         --
    ipv6.gateway:                           --
    ipv6.routes:                            --
    ipv6.route-metric:                      -1
    ipv6.ignore-auto-routes:                no
    ipv6.ignore-auto-dns:                   no
    ipv6.never-default:                     no
    ipv6.may-fail:                          yes
    ipv6.ip6-privacy:                       -1 (未知)
    ipv6.addr-gen-mode:                     stable-privacy
    ipv6.dhcp-send-hostname:                yes
    ipv6.dhcp-hostname:                     --
    ipv6.token:                             --
    proxy.method:                           none
    proxy.browser-only:                     no
    proxy.pac-url:                          --
    proxy.pac-script:                       --
    GENERAL.名称:                           enp0s3
    GENERAL.UUID:                           ae1646b6-4867-4aa8-ac04-a45551f0e4ea
    GENERAL.设备:                           enp0s3
    GENERAL.状态:                           已激活
    GENERAL.默认:                           是
    GENERAL.默认6:                          否
    GENERAL.VPN 参数:                       否
    GENERAL.区:                             --
    GENERAL.DBUS路径:                       /org/freedesktop/NetworkManager/ActiveConnection/4
    GENERAL.连接路径:                       /org/freedesktop/NetworkManager/Settings/1
    GENERAL.指定对象:                       --
    GENERAL.主路径:                         --
    IP4.地址[1]:                            172.20.31.221/24
    IP4.网关:                               172.20.31.240
    IP4.DNS[1]:                             202.96.64.68
    IP6.地址[1]:                            fe80::6c87:9541:45b7:f8d8/64
    IP6.网关:                    


    因为在CentOS7.x中取消了ifconfig命令, 我们使用ip addr来代替。

    [wangdeqiang@localhost ~]$ ip addr
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
        link/ether 08:00:27:dc:63:24 brd ff:ff:ff:ff:ff:ff
        inet 172.20.31.221/24 brd 172.20.31.255 scope global enp0s3
           valid_lft forever preferred_lft forever
        inet6 fe80::6c87:9541:45b7:f8d8/64 scope link 
           valid_lft forever preferred_lft forever
    3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
        link/ether 52:54:00:75:ff:72 brd ff:ff:ff:ff:ff:ff
        inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
           valid_lft forever preferred_lft forever
    4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
        link/ether 52:54:00:75:ff:72 brd ff:ff:ff:ff:ff:ff
    [wangdeqiang@localhost ~]$ 
    


    4、设置双IP

    [wangdeqiang@localhost ~]$ cd /etc/sysconfig/network-scripts/
    [wangdeqiang@localhost network-scripts]$ sudo cp ifcfg-enp0s3 ifcfg-enp0s3:1
    [sudo] wangdeqiang 的密码:
    [wangdeqiang@localhost network-scripts]$ vi ifcfg-enp0s3:1
    
    


    将下列二项内容进行修改:

    TYPE=Ethernet
    PROXY_METHOD=none
    BROWSER_ONLY=no
    BOOTPROTO=none
    DEFROUTE=yes
    IPV4_FAILURE_FATAL=no
    IPV6INIT=yes
    IPV6_AUTOCONF=yes
    IPV6_DEFROUTE=yes
    IPV6_FAILURE_FATAL=no
    IPV6_ADDR_GEN_MODE=stable-privacy
    NAME=enp0s3
    UUID=ae1646b6-4867-4aa8-ac04-a45551f0e4ea
    DEVICE=enp0s3
    ONBOOT=yes
    IPADDR=172.20.31.221
    PREFIX=24
    GATEWAY=172.20.31.240
    DNS1=202.96.64.68
    


    保存退出后,生词网络服务,然后查看配置信息

    CentOS7怎么保存退出vi编辑

    ---------------------------------------------------



    保存命令

    按ESC键 跳到命令模式,然后:

    :w 保存文件但不退出vi
    
    :w file 将修改另外保存到file中,不退出vi
    
    :w! 强制保存,不推出vi
    
    :wq 保存文件并退出vi
    
    :wq! 强制保存文件,并退出vi
    
    q: 不保存文件,退出vi
    
    :q! 不保存文件,强制退出vi
    
    :e! 放弃所有修改,从上次保存文件开始再编辑
    
    
    
    




    保存退出后,生词网络服务,然后查看配置信息

    [wangdeqiang@localhost network-scripts]$ nmcli connection show enp0s3
    connection.id:                          enp0s3
    connection.uuid:                        ae1646b6-4867-4aa8-ac04-a45551f0e4ea
    connection.stable-id:                   --
    connection.interface-name:              enp0s3
    connection.type:                        802-3-ethernet
    connection.autoconnect:                 yes
    connection.autoconnect-priority:        0
    connection.autoconnect-retries:         -1 (默认)
    connection.timestamp:                   1516628218
    connection.read-only:                   no
    connection.permissions:                 --
    connection.zone:                        --
    connection.master:                      --
    connection.slave-type:                  --
    connection.autoconnect-slaves:          -1 (默认)
    connection.secondaries:                 --
    connection.gateway-ping-timeout:        0
    connection.metered:                     未知
    connection.lldp:                        -1 (default)
    802-3-ethernet.port:                    --
    802-3-ethernet.speed:                   0
    802-3-ethernet.duplex:                  --
    802-3-ethernet.auto-negotiate:          no
    802-3-ethernet.mac-address:             --
    802-3-ethernet.cloned-mac-address:      --
    802-3-ethernet.generate-mac-address-mask:--
    802-3-ethernet.mac-address-blacklist:   --
    802-3-ethernet.mtu:                     自动
    802-3-ethernet.s390-subchannels:        --
    802-3-ethernet.s390-nettype:            --
    802-3-ethernet.s390-options:            --
    802-3-ethernet.wake-on-lan:             1 (default)
    802-3-ethernet.wake-on-lan-password:    --
    ipv4.method:                            manual
    ipv4.dns:                               202.96.64.68
    ipv4.dns-search:                        --
    ipv4.dns-options:                       (默认)
    ipv4.dns-priority:                      0
    ipv4.addresses:                         172.20.31.221/24
    ipv4.gateway:                           172.20.31.240
    ipv4.routes:                            --
    ipv4.route-metric:                      -1
    ipv4.ignore-auto-routes:                no
    ipv4.ignore-auto-dns:                   no
    ipv4.dhcp-client-id:                    --
    ipv4.dhcp-timeout:                      0
    ipv4.dhcp-send-hostname:                yes
    ipv4.dhcp-hostname:                     --
    ipv4.dhcp-fqdn:                         --
    ipv4.never-default:                     no
    ipv4.may-fail:                          yes
    ipv4.dad-timeout:                       -1 (默认)
    ipv6.method:                            auto
    ipv6.dns:                               --
    ipv6.dns-search:                        --
    ipv6.dns-options:                       (默认)
    ipv6.dns-priority:                      0
    ipv6.addresses:                         --
    ipv6.gateway:                           --
    ipv6.routes:                            --
    ipv6.route-metric:                      -1
    ipv6.ignore-auto-routes:                no
    ipv6.ignore-auto-dns:                   no
    ipv6.never-default:                     no
    ipv6.may-fail:                          yes
    ipv6.ip6-privacy:                       -1 (未知)
    ipv6.addr-gen-mode:                     stable-privacy
    ipv6.dhcp-send-hostname:                yes
    ipv6.dhcp-hostname:                     --
    ipv6.token:                             --
    proxy.method:                           none
    proxy.browser-only:                     no
    proxy.pac-url:                          --
    proxy.pac-script:                       --
    GENERAL.名称:                           enp0s3
    GENERAL.UUID:                           ae1646b6-4867-4aa8-ac04-a45551f0e4ea
    GENERAL.设备:                           enp0s3
    GENERAL.状态:                           已激活
    GENERAL.默认:                           是
    GENERAL.默认6:                          否
    GENERAL.VPN 参数:                       否
    GENERAL.区:                             --
    GENERAL.DBUS路径:                       /org/freedesktop/NetworkManager/ActiveConnection/4
    GENERAL.连接路径:                       /org/freedesktop/NetworkManager/Settings/1
    GENERAL.指定对象:                       --
    GENERAL.主路径:                         --
    IP4.地址[1]:                            172.20.31.221/24
    IP4.网关:                               172.20.31.240
    IP4.DNS[1]:                             202.96.64.68
    IP6.地址[1]:                            fe80::6c87:9541:45b7:f8d8/64
    IP6.网关:                               --
    



    查看全部网络设备信息

    [wangdeqiang@localhost network-scripts]$ ip addr
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
           valid_lft forever preferred_lft forever
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
        link/ether 08:00:27:ef:69:36 brd ff:ff:ff:ff:ff:ff
        inet 172.20.31.221/24 brd 172.20.31.255 scope global enp0s3
           valid_lft forever preferred_lft forever
        inet 172.20.31.222/24 brd 172.20.31.255 scope global secondary enp0s3:1
           valid_lft forever preferred_lft forever
        inet6 fe80::a00:27ff:feef:6936/64 scope link
           valid_lft forever preferred_lft forever


    
    
    3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
        link/ether 52:54:00:75:ff:72 brd ff:ff:ff:ff:ff:ff
        inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
           valid_lft forever preferred_lft forever
    4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
        link/ether 52:54:00:75:ff:72 brd ff:ff:ff:ff:ff:ff
    [wangdeqiang@localhost network-scripts]$ 
    


    在enp0s3中会出现二个”inet”,包含配置过的二个IP的信息。

    5、配置hostname 
    使用hostnamectl来配置主机的hostname

    [wangdeqiang@localhost network-scripts]$ hostnamectl set-hostname www.cmzsteven.com
    [wangdeqiang@localhost network-scripts]$ cat /etc/hostname
    www.cmzsteven.com
    


    6、自动获取IP地址 
    如果局域网里有DHCP服务器,那么可以使用自动获取来取得主机的IP等相关信息

    [wangdeqiang@localhost network-scripts]$ nmcli connection modify enp0s3
    > connection.autoconnect yes
    > ipv4.method auto
















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  • 原文地址:https://www.cnblogs.com/CCCrunner/p/11781747.html
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