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P2P network Simulation using NS3 | NS3 Tutorial

Top 10 Networking Commands in Linux

There are many network commands linux supports but there are only a few commands that explore the major things in a network. There are 10 such networking commands in Linux to explore the routing, packets, etc.
if you want to know about the commands use "man commandname" (without Quotes)
Command 1:
# ifconfig
you may use the options to configure ifconfig -v (for showing the verbose mode)
command to configure the given network interface (wlan0, eth0, etc)
Command 2 :
# ping

To send ICMP, Echo request to hosts

Here is the output
PING ( 56(84) bytes of data.
64 bytes from icmp_req=1 ttl=128 time=0.735 ms
64 bytes from icmp_req=2 ttl=128 time=0.871 ms

--- ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 0.735/0.803/0.871/0.068 ms
Command 3: 
traceroute domainname or IP Address
print the route packets trace to network host
See the image below for output
Command 4: 
route -n
 show / manipulate the IP routing table
it displays the kernel routing table with the default address and next hop address as given below
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface         UG    0      0        0 wlan0     U     1000   0        0 wlan0   U     9      0        0 wlan0   U     0      0        0 vmnet8   U     0      0        0 vmnet1
Command 5: 
# nslookup domainname
it querys Internet name servers interactively
Command 6: 
telnet ipaddress
user interface to the TELNET protocol
it uses to connect to other machines using the TELNET protocol
Command 7: 
ssh ipaddress
OpenSSH SSH client (remote login program)
the usage is
ssh username@ipaddress
you need to enter the password of the user
Ex: ssh pradeepkumar@
if you want to use it with graphical interface, "ssh -X pradeepkumar@"
Command 8: 
host ipaddress or domainname (DNS lookup utility)
Here is the output for the following 
Command 9: 
dig ipaddress mx   (DNS lookup utility (domain information groper))
dig mx (mx for mail exchange)
Command 10: 
netstat -a
Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships


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