[root@alanstudio]# dig xyz.com
DNS look up of record A,NX for the domain. (-t mx Look up DNS of MX record)
[root@alanstudio]# dig -t mx xyz.com
Show all IP configuration
[root@alanstudio]# netstat -tlanup
Show detial of network port status
[root@alanstudio]# nmap www.abc.com
Scan port using nmap
Show the routing and gateway
yum install iftop
Iftop measures the data flowing through individual socket connections, and it works in a manner that is different from Nload. Iftop uses the pcap library to capture the packets moving in and out of the network adapter, and then sums up the size and count to find the total bandwidth under use.
iftop -n -P -N
trafshow -i eth0 -n tcp
trafshow reports the current active connections, their protocol and the TOTAL data transfer on each connection.
Nethogs is a small 'net top' tool that shows the bandwidth used by individual processes
## Go to download latest i386/x86_64 rpmforge-release
Pktstat displays all the active connections in real time, and the speed at which data is being transferred through them. It also displays the type of the connection, i.e. tcp or udp and also details about http requests if involved.
rpm -Uvh rpmforge-release*.rpm
yum install pktstat
pktstat -i eth0 -ntT
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Linux Operating System
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