Shulou(Shulou.com)06/01 Report--

This article mainly introduces what are the commonly used network commands in RHEL7, which can be used for reference. Interested friends can refer to them. I hope you will gain a lot after reading this article.

Ping checks network connectivity

Ping is often used to test connectivity to the destination host.

You can ping [root@chao ~] # ping 172.16.1.254PING 172.16.1.254 (172.16.1.254) 56 (84) bytes of data.64 bytes from 172.16.1.254: icmp_seq=1 ttl=128 time=0.529 ms64 bytes from 172.16.1.254: icmp_seq=2 ttl=128 time=0.297 ms64 bytes from 172.16.1.254: icmp_seq=3 ttl=128 time=0.135 ms64 bytes from 172.16.1.254: icmp_seq=4 ttl=128 time=0.245 ms64 bytes from 172. 16.1.254: icmp_seq=5 ttl=128 time=0.214 Ms ^ C-172.16.1.254 ping statistics-5 packets transmitted 5 received, 0 packet loss Time 4001msrtt min/avg/max/mdev = 0.135icmp_seq=1 Destination Host UnreachableFrom 0.284 ms 0.529 ms [root@chao] # cannot ping [root@chao] # ping 172.16.1.250PING 172.16.1.250 (172.16.1.250) 56 (84) bytes of data.From 172.16.1.16 icmp_seq=1 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=2 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=3 Destination Host UnreachableFrom 172.16 .1.16 icmp_seq=4 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=5 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=6 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=7 Destination Host UnreachableFrom 172.16.1.16 icmp_seq=8 Destination Host Unreachable ^ C-172.16.1.250 ping statistics-9 packets transmitted 0 received, + 8 errors, 100% packet loss, time 8003mspipe 4 configure the network

Set up ip

[root@chao ~] # ifconfig ens33:1 172.16.1.114 netmask 255.255.255.0 up

Change MAC address

[root@chao ~] # ifconfig ens33:1 hw ether 00:0c:29:0b:07:77

Modify routing tabl

Show routing tabl

[root@chao ~] # route-nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface0.0.0.0 172.16.1.254 0.0.0.0 UG 10000 ens33172.16.1.0 0.0.0.0 255.255.255.0 U 10000 ens33192.168.122.0 0.0.0 . 0 255.255.255.0 U 0 0 0 virbr0

Add rout

[root@chao] # route add-net 172.16.2.0 netmask 255.255.255.0 gw 172.16.1.254

Delete a rout

[root@chao ~] # route del-net 172.16.2.0 netmask 255.255.255.0 View Network status

View all ports

[root@chao ~] # netstat-a | head-4Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:sunrpc 0.0.0.0 LISTEN * LISTEN tcp 0 0 chao:domain 0.0.0.0 4Active Internet connections * LISTEN

View tcp port

[root@chao ~] # netstat-atActive Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:sunrpc 0.0.0.0 Proto Recv-Q Send-Q Local Address Foreign Address State tcp * LISTEN tcp 0 0 chao:domain 0.0.0.0 atActive Internet connections * LISTEN tcp 0 0 0.0.0.0:ssh 0.0.0.0 localhos:x11-ssh-offset * LISTEN tcp 00 localhos:x11-ssh-offset 0.0.0.0 LISTEN tcp 0 36 chao:ssh 172.16.1.100 0.0.0.0:ssh 57418 ESTABLISHEDtcp6 00 [:]: sunrpc [:: ]: * LISTEN tcp6 0 [:]: ssh [::]: * LISTEN tcp6 0 0 localhos:x11-ssh-offset [::]: * LISTEN

View udp port

[root@chao ~] # netstat-auActive Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State udp 0 0 chao:domain 0.0.0.0 Proto Recv-Q Send-Q Local Address Foreign Address State udp * udp 0 0 0.0.0.0:bootps 0.0.0.0 auActive Internet connections * Udp 0 0 localhost:323 0.0.0.0 localhost:323 * udp6 0 0 localhost:323 [:]: * traceroute View routing information [root@chao ~] # traceroute to www.baidu.com (103.235.46.39) 30 hops max 60 byte packets1 gateway (172.16.1.254) 0.132 ms 0.062 ms 0.086 ms2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 11 * 12 * 13 * 14 * 15 * * * 16 * 17 * 18 * 19 * 20 * 21 * 22 * 23 * 24 * 25 * 26 * telnet Test remote port [root@chao ~] # telnet 172.16.1.16 80wget download network file [root@chao ~] # wget https:/ / mirror.bit.edu.cn/apache/httpd/httpd-2.4.43.tar.gz

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