Linux之临时配置网络（ip，网关，dns）+永久配置

作业一：临时配置网络（ip，网关，dns）+永久配置

1. 配置网络信息

[root@localhost ~]# ifconfig

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        inet 192.168.202.131  netmask 255.255.255.0  broadcast 192.168.202.255

        inet6 fe80::20c:29ff:fe9d:a0df  prefixlen 64  scopeid 0x20<link>

        ether 00:0c:29:9d:a0:df  txqueuelen 1000  (Ethernet)

        RX packets 23620  bytes 2085149 (1.9 MiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 12933  bytes 1815875 (1.7 MiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 0  (Local Loopback)

        RX packets 2767  bytes 389871 (380.7 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 2767  bytes 389871 (380.7 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# ifconfig eno16777736 192.168.202.132/24

Connection closed by foreign host.

[root@localhost network-scripts]# ifconfig

eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500

        inet 192.168.202.132  netmask 255.255.255.0  broadcast 192.168.202.255

        inet6 fe80::20c:29ff:fe9d:a0df  prefixlen 64  scopeid 0x20<link>

        ether 00:0c:29:9d:a0:df  txqueuelen 1000  (Ethernet)

        RX packets 23954  bytes 2108353 (2.0 MiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 13040  bytes 1827860 (1.7 MiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536

        inet 127.0.0.1  netmask 255.0.0.0

        inet6 ::1  prefixlen 128  scopeid 0x10<host>

        loop  txqueuelen 0  (Local Loopback)

        RX packets 2767  bytes 389871 (380.7 KiB)

        RX errors 0  dropped 0  overruns 0  frame 0

        TX packets 2767  bytes 389871 (380.7 KiB)

        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

1. 配置网关

[root@localhost network-scripts]# vim /etc/resolv.conf

[root@localhost network-scripts]# route add default gw 192.168.202.2 netmask 255.255.255.0

[root@localhost /]# route -n

 [root@localhost /]# route del default gw 192.168.202.2 netmask 255.255.255.0

[root@localhost /]# route -n

3.永久配置

[root@localhost /]# cd /etc/sysconfig/network-scripts/

[root@localhost network-scripts]# ls

 [root@localhost network-scripts]# vim ifcfg-eno16777736