Linux日常管理技巧：Linux网络相关和防火墙

Posted 2020-10-22

一、Linux网络相关

1. ifconfig 查看网卡IP

ifconfig命令被用于配置和显示Linux内核中网络接口的网络参数。用ifconfig命令配置的网卡信息，在网卡重启后机器重启后，配置就不存在。要想将上述的配置信息永远的存的电脑里，那就要修改网卡的配置文件了。

[[email protected] ~]# ifconfig       //直接输入该命令即可查看网卡
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.204.128  netmask 255.255.255.0  broadcast 192.168.204.255
        inet6 fe80::9045:61b6:c7f7:5501  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:34:a9:bc  txqueuelen 1000  (Ethernet)
        RX packets 76554  bytes 26401473 (25.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 71194  bytes 17838448 (17.0 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 1  (Local Loopback)
        RX packets 96  bytes 8300 (8.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 96  bytes 8300 (8.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0