Skip to main content

VLAN implementation using NS2

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 172.16.1.10

To send ICMP, Echo request to hosts

Here is the output
PING 172.16.1.10 (172.16.1.10) 56(84) bytes of data.
64 bytes from 172.16.1.10: icmp_req=1 ttl=128 time=0.735 ms
64 bytes from 172.16.1.10: icmp_req=2 ttl=128 time=0.871 ms

--- 172.16.1.10 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
Ex: 
traceroute www.vit.ac.in
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
Output:
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         172.16.0.10     0.0.0.0         UG    0      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
172.16.0.0      0.0.0.0         255.255.192.0   U     9      0        0 wlan0
172.16.29.0     0.0.0.0         255.255.255.0   U     0      0        0 vmnet8
172.16.33.0     0.0.0.0         255.255.255.0   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@172.16.49.132
if you want to use it with graphical interface, "ssh -X pradeepkumar@172.16.49.132"
Command 8: 
host ipaddress or domainname (DNS lookup utility)
Here is the output for the following 
host nsnam.com
Command 9: 
dig ipaddress mx   (DNS lookup utility (domain information groper))
dig nsnam.com mx (mx for mail exchange)
Command 10: 
netstat -a
Print network connections, routing tables, interface statistics, masquerade connections, and multicast memberships

Comments

Popular posts from this blog

Installing ns3 in Ubuntu 22.04 | Complete Instructions

In this post, we are going to see how to install ns-3.36.1 in Ubuntu 22.04. You can follow the video for complete details Tools used in this simulation: NS3 version ns-3.36.1  OS Used: Ubuntu 22.04 LTS Installation of NS3 (ns-3.36.1) There are some changes in the ns3 installation procedure and the dependencies. So open a terminal and issue the following commands Step 1:  Prerequisites $ sudo apt update In the following packages, all the required dependencies are taken care and you can install all these packages for the complete use of ns3. $ sudo apt install g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-

Installation of NS2 in Ubuntu 22.04 | NS2 Tutorial 2

NS-2.35 installation in Ubuntu 22.04 This post shows how to install ns-2.35 in Ubuntu 22.04 Operating System Since ns-2.35 is too old, it needs the following packages gcc-4.8 g++-4.8 gawk and some more libraries Follow the video for more instructions So, here are the steps to install this software: To download and extract the ns2 software Download the software from the following link http://sourceforge.net/projects/nsnam/files/allinone/ns-allinone-2.35/ns-allinone-2.35.tar.gz/download Extract it to home folder and in my case its /home/pradeepkumar (I recommend to install it under your home folder) $ tar zxvf ns-allinone-2.35.tar.gz or Right click over the file and click extract here and select the home folder. $ sudo apt update $ sudo apt install build-essential autoconf automake libxmu-dev gawk To install gcc-4.8 and g++-4.8 $ sudo gedit /etc/apt/sources.list make an entry in the above file deb http://in.archive.ubuntu.com/ubuntu/ bionic main universe $ sudo apt update Since, it&#

Installation of NS2 (ns-2.35) in Ubuntu 20.04

Installation of NS2 (ns-2.35) in Ubuntu 20.04 LTS Step 1: Install the basic libraries like      $] sudo apt install build-essential autoconf automake libxmu-dev Step 2: install gcc-4.8 and g++-4.8 open the file using sudo mode $] sudo nano /etc/apt/sources.list Include the following line deb http://in.archive.ubuntu.com/ubuntu bionic main universe $] sudo apt update $] sudo apt install gcc-4.8 g++-4.8 Step 3:  Unzip the ns2 packages to home folder $] tar zxvf ns-allinone-2.35.tar.gz $] cd ns-allinone-2.35/ns-2.35 Modify the following make files. ~ns-2.35/Makefile.in Change @CC@ to gcc-4.8 change @CXX@ to g++-4.8 ~nam-1.15/Makefile.in ~xgraph-12.2/Makefile.in ~otcl-1.14/Makefile.in Change in all places  @CC@ to gcc-4.8 @CPP@ or @CXX@ to g++-4.8 open the file: ~ns-2.35/linkstate/ls.h Change at the Line no 137  void eraseAll() { erase(baseMap::begin(), baseMap::end()); } to This void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); } All changes made Step 4: Open a new termi