网络相干命令

ifconfig：查看网卡信息

[root@localhost chmod_test]# ifconfigenp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.0.112  netmask 255.255.255.0  broadcast 192.168.0.255        inet6 fe80::6f25:133:e614:f7c4  prefixlen 64  scopeid 0x20<link>        ether 08:00:27:b5:11:ba  txqueuelen 1000  (Ethernet)        RX packets 1710  bytes 128876 (125.8 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 549  bytes 59638 (58.2 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: 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 1000  (Local Loopback)        RX packets 4  bytes 344 (344.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 4  bytes 344 (344.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ping：测试近程主机联通性

罕用形式：

  • ping -c 次数 IP地址：连贯多少次
  • ping -i 间隔时间 IP地址：每次 ping 的间隔时间
[root@localhost chmod_test]# ping -c 3 -i 3 www.baidu.comPING www.baidu.com (14.215.177.39) 56(84) bytes of data.64 bytes from www.baidu.com (14.215.177.39): icmp_seq=1 ttl=128 time=12.9 ms64 bytes from www.baidu.com (14.215.177.39): icmp_seq=2 ttl=128 time=21.3 ms64 bytes from www.baidu.com (14.215.177.39): icmp_seq=3 ttl=128 time=16.4 ms--- www.baidu.com ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 6021msrtt min/avg/max/mdev = 12.904/16.909/21.382/3.480 ms

netstat：打印网络连接情况、所凋谢的端口、路由表等信息

罕用形式：

  • netstat -ntpl：打印以后系统启动哪些端口