网络相关命令ifconfig:查看网卡信息[root@localhostchmod_test]#ifconfigenp0s3:flags=4163mtu1500inet192.168.0.112netmask255.255.255.0broadcast192.168.0.2515inet6f255::::e614:f7c4prefixlen64scopeid0x20ether08:00:27:b5:11:batxqueuelen1000（以太网）RX数据包1710字节128876（125.8KiB）RX错误0丢弃0溢出0帧0TX9个数据包59638(58.2KiB)TXerrors0dropped0overruns0carrier0collisions0lo:flags=73mtu65536inet127.0.0.1netmask255.0.0.0inet6::1prefixlenque128scopeid0x11000(LocalLoopback)RXpackets4bytes344(344.0B)RXerrors0dropped0overruns0frame0TXpackets4bytes344(344.0B)TXerrors0dropped0overruns0carrier0collisions0ping：常用于测试远程主机的连通性类型：ping-c次IP地址：连接多少次ping-iintervalIP地址：每次ping的间隔[root@localhostchmod_test]#ping-c3-i3www.baidu.comPINGwww.baidu。com(14.215.177.39)56(84)bytesofdata.64bytesfromwww.baidu.com(14.215.177.39):icmp_seq=1ttl=128time=12.9ms64bytesfromwww.baidu.com(14.215.177.39):icmp_seq=2ttl=128time=21.3ms64bytesfromwww.baidu.com(14.215.177.39):icmp_seq=3ttl=128time=16.4ms---www.baidu.comping统计---3个数据包传输,3received,0%packetloss,time6021msrttmin/avg/max/mdev=12.904/16.909/21.382/3.480msnetstat：打印网络连接状态，开放端口，路由表等信息常用方法：netstat-ntpl：打印当前系统启用了哪些端口
