Network test commands in Linux

ping command:

Ping address detection can communicate with address change

-C 3 Ping3 time termination

traceroute command:

Traceroute IP or domain name routing trace command

tcpdump command: (Grab package command)

Tcpdump-i ECH0-NNX Port 21

-i specifies the NIC interface

-nn the domain name and service in the packet to IP and port

-X Display packet contents in 16 binary and ASCII code

PORT Specifies the listening port

Start FTP service: Service vsftpd start

Disable and enable network cards in Linux:

Ifdown Network card name disable NIC

IFUP network card name enable NIC

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Network test commands in Linux