Linux基础指令网络管理002

       Linux网络管理涉及配置、监控和维护网络接口、路由、防火墙规则、网络服务等，本章主要讲述如何查看网络接口以及管理网络连接。

操作系统：

CentOS Stream 9

操作步骤：

查看网络接口及ip信息

指令ipconfig ,如果不能使用该命令先下载 yum -y install net-tools

[root@localhost ~]# ifconfig
ens160: flags=4163  mtu 1500
        inet 192.168.80.111  netmask 255.255.255.0  broadcast 192.168.80.255
        inet6 fe80::20c:29ff:fe25:e07d  prefixlen 64  scopeid 0x20
        ether 00:0c:29:25:e0:7d  txqueuelen 1000  (Ethernet)
        RX packets 12032  bytes 1629911 (1.5 MiB)
        RX errors 0  dropped 4033  overruns 0  frame 0
        TX packets 5171  bytes 550950 (538.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

指令ip

[root@localhost ~]# ip add
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens160:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:25:e0:7d brd ff:ff:ff:ff:ff:ff
    altname enp3s0
    inet 192.168.80.111/24 brd 192.168.80.255 scope global noprefixroute ens160
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe25:e07d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@localhost ~]# ip -4 a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: ens160:  mtu 1500 qdisc mq state UP group default qlen 1000
    altname enp3s0
    inet 192.168.80.111/24 brd 192.168.80.255 scope global noprefixroute ens160
       valid_lft forever preferred_lft forever
[root@localhost ~]# 

管理网络连接

指令nmcli   管理网络连接，如创建、删除、启用、禁用网络连接

[root@localhost ~]# nmcli c reload
[root@localhost ~]# nmcli c up ens160
连接已成功激活（D-Bus 活动路径：/org/freedesktop/NetworkManager/ActiveConnection/3）
[root@localhost ~]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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: ens160:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:25:e0:7d brd ff:ff:ff:ff:ff:ff
    altname enp3s0
    inet 192.168.80.111/24 brd 192.168.80.255 scope global noprefixroute ens160
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe25:e07d/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@localhost ~]#