Ubuntu installation

STEP 1:
copy necessary zip files to a folder like (/home/arun)
STEP 2:
arun@ubuntu:~/software$ sudo addgroup hadoop
[sudo] password for arun:
Adding group `hadoop' (GID 1001) ...
Done.
STEP 3:
Add user to the group hadoop so that only hadoop user in hadoop group can change the hadoop files
arun@ubuntu:~/software$ sudo adduser --ingroup hadoop hdadmin
Adding user `hdadmin' ...
Adding new user `hdadmin' (1001) with group `hadoop' ...
Creating home directory `/home/hdadmin' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for hdadmin
Enter the new value, or press ENTER for the default
Full Name []: arun
Room Number []: arun
Work Phone []: arun
Home Phone []: arun
Other []: arun
Is the information correct? [Y/n] y

STEP 4:
install java and copy to /home/arun/bigdata folder
NOTE: will cause link issue see below link and path cannot be same.
arun@ubuntu:~/software$ sudo tar vxzf jdk-7u79-linux-i586.tar.gz -C /home/arun/bigdata/java/
like in windows java,javaw,javaws are set in windows 32 path to make it accessible anywhere
ubuntu needs need to be triggered to make accessible from anywhere any folder. These three
applications files need to registered in ubuntu system by below commands.
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/bin/java" java
"/home/arun/bigdata/java/jdk1.7.0_79" 1
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/bin/javac" javac
"/home/arun/bigdata/java/jdk1.7.0_79/bin/javac" 1
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/bin/javaws" javaws
"/home/arun/bigdata/java/jdk1.7.0_79/bin/javaws" 1
NOTE:
Make sure you give command correctly especially "/usr/bin/java" java part else it will override
sudo update-alternatives --install "/usr/bin/java" java "/home/arun/bigdata/java/jdk1.7.0_79" 1
sudo update-alternatives --install "/usr/bin/javac" javac
update-alternatives: using /home/arun/bigdata/java/jdk1.7.0_79/bin/javaws to provide
/usr/bin/javaws (javaws) in auto mode.

Each time you run it shows the below message indicating sucessfully registered
update-alternatives: renaming java link from /usr/bin/java to /usr/bin/javac.
arun@ubuntu:~/software$
if java installed in other than usr/bin folder these issue will occur.see below it adds extra /java
arun@ubuntu:~$ java -version
bash: /home/arun/bigdata/java/jdk1.7.0_79/bin/java: No such file or directory
bash: /home/arun/bigdata/java/jdk1.7.0_79/bin/java: No such file or directory
STEP 5:
update the environment variable using either nano, vi or gedit editor
root@ubuntu:/home/arun#nano /etc/bash.bashrc
^O to edit the file
^X to save the changes, it will ask whether to save the changes. if yes is given it will save.
Command:
arun@ubuntu:~$ gedit /etc/bash.bashrc
Append below lines to bash.bashrc file
export JAVA_HOME=/home/arun/bigdata/java/jdk1.7.0_79 or

export JAVA_HOME=/usr/lib/java/jdk1.7.0_79
export PATH=$PATH:$JAVA_HOME/bin
export is small case
since bash.bashrc file cannot be editted by normal user , use sudo root user in admin
arun@ubuntu:~$ sudo passwd root
go to root and edit.
arun@ubuntu:~$Sudo -i
the admin permission persist only for that session
arun@ubuntu:~$ su root
Password:
root@ubuntu:/home/arun#
To overcome the above error try Changing the path
$arun@ubuntu:~/software$ sudo update-alternatives --install
"/home/arun/bigdata/java/jdk1.7.0_79/bin/java" java "/home/arun/bigdata/java/jdk1.7.0_79" 1
$arun@ubuntu:~/software$ sudo update-alternatives –install
"/home/arun/bigdata/java/jdk1.7.0_79/bin/javac" javac
$arun@ubuntu:~/software$ sudo update-alternatives --install
"/home/arun/bigdata/java/jdk1.7.0_79/bin/javaws" javaws
"/home/arun/bigdata/java/jdk1.7.0_79/bin/javaws" 1

update-alternatives: <link> and <path> can't be the same
hence re-install java in /usr/java directory
To solve this issue
First create a dir in /usr/lib/
root@ubuntu:~# mkdir /usr/lib/java
or
root@ubuntu:~# sudo mkdir -p /usr/lib/java
arun@ubuntu:~/software$ sudo tar vxzf jdk-7u79-linux-i586.tar.gz -C
/usr/lib/java/
only in software dir only it allows to extract from root or arun dir it wont
allow to extract
root@ubuntu:/home/arun/ software# sudo tar vxzf jdk-7u79-linux-i586.tar.gz -C
/usr/lib/java/
now change the env variable
update the link:
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/java"
java "/usr/bin/java" 1
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/javac"
javac "/usr/bin/javac" 1
$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/javaws"
javaws "/usr/bin/javaws" 1

Above see only javac,javaws is created during installation hence the error below
if any java,javac,javaws is not in /usr/bin/ better manually copy. Since below showing error
root@ubuntu:/# sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/java" java
"/usr/bin/java" 1
update-alternatives: error: alternative path /usr/bin/java doesn't exist.
Now try

$arun@ubuntu:~/software$ sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/java"
now worked...
sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/java" java "/usr/bin/java" 1
see javaws still pointing to /home /arun need re-installation just copy java,javac,jaws from
/usr/lib/java/bin to /usr/bin
root@ubuntu:/usr/bin# sudo update-alternatives --install "/usr/lib/java/jdk1.7.0_79/bin/java"
root@ubuntu:/usr/bin# sudo update-alternatives --install
"/usr/lib/java/jdk1.7.0_79/bin/javac" javac "/usr/bin/javac" 1
root@ubuntu:/usr/bin# sudo update-alternatives --install
"/usr/lib/java/jdk1.7.0_79/bin/javaws" javaws "/usr/bin/javaws" 1
update-alternatives: warning: forcing reinstallation of alternative
/home/arun/bigdata/java/jdk1.7.0_79/bin/javaws because link group javaws is broken.
To see which version is currently in use
arun@ubuntu:~$ update-alternatives --config java
arun@ubuntu:~$ update-alternatives --config javac
arun@ubuntu:~$ update-alternatives --config javaws

before install java:
update-alternatives: error: no alternatives for java.
Still no result
update-alternatives: error: no alternatives for java.
arun@ubuntu:~$

above vdi image alone is enough to create a new vdi from existing one. Easy transport this one to
any system.

If causing issues some issues then use it under /home/arun/bigdata/ without registering update-
alternatives showing error " /usr/bin/java No such file or directory"
export JAVA_HOME=/home/arun/bigdata/java/jdk1.7.0_79
export PATH=$PATH:$JAVA_HOME/bin
Three settings to note after installation of ubuntu
After installation of ubuntu and after guest installation cd images run check it is good
else problem with memory increase memory and try do not change any other settings.
STEP 1-Guest Additions

Once the guest additions installed become screen should be showed even compilatin fails is there
it is ok.Restart the system as mentioned and try.
STEP 2-Desktop Integration
Seamless mode is the correct mode to view once restart it should show correctly as below
i.e menuand header properly

NOTE: see below switch between normal seamless desktop integration mode. It should be
selected.Shortcut is (RIGHT+CTRL:L)
STEP 3 -Mouse Integration
see now mouse integration is checked
NOTE: enable host mouse pointer integration.
STEP 5 – Clipboard settings for copy from windows to ubuntu and viceversa
Check ubuntu-settings >general>advanced>shared clipboard (bi-directional)
drag-drop>bi-direction.

STEP 5 -Network
STEP 6 -Add user / group
add group
arun@ubuntu:~/java/jdk1.7.0_79/bin$ sudo addgroup hadoop
Adding group `hadoop' (GID 1001) ...
Done.
Add User
Adding user `hdadmin' ...
Adding new user `hdadmin' (1001) with group `hadoop' ...
Creating home directory `/home/hdadmin' ...
Copying files from `/etc/skel' ...

Reset Root passwd
arun@ubuntu:~/java$ sudo passwd root
arun@ubuntu:~/java$
login in to root passwd
STEP 7 – Check folder have permission
Try manually set environment variable and run java if wont run may be permission issue
hdadmin@ubuntu:/home/arun/java/jdk1.7.0_79/bin$ export
JAVA_HOME=/home/arun/java/jdk1.7.0_79
hdadmin@ubuntu:/home/arun/java/jdk1.7.0_79/bin$ export PATH=$PATH:
$JAVA_HOME/binhdadmin@ubuntu:/home/arun/java/jdk1.7.0_79/bin$ java -version
bash: /home/arun/java/jdk1.7.0_79/bin/java: No such file or directory
hdadmin@ubuntu:/home/arun/java/jdk1.7.0_79/bin$

it seems to be issue with the permission.
First login with a user created above and then install the java from that user login.

Use su root and delete old java as you can other cannot delete fully only su root can delete all files
login in now as created above user (hdadmin)
re-install java

NOTE:
hdadmin@ubuntu:/home/arun/softwares$ su hdadmin
Password:
hdadmin@ubuntu:/home/arun/softwares$
[sudo] password for hdadmin:
Sorry, try again.
[sudo] password for hdadmin:
hdadmin is not in the sudoers file. This incident will be reported.
Hduser is not in sudo list means not created user while installing ubuntu.
So need to add arun(user created at time of ubuntu installation) to the hadoop group then only we
can edit.
sudo usermod -a -G GROUPNAME USERNAME
root@ubuntu:/home/arun/softwares# usermod -a -G hadoop
arunroot@ubuntu:/home/arun/softwares# sudo tar vxzf jdk-7u79-linux-i586.tar.gz -C
/home/arun/java
jdk1.7.0_79/db/RELEASE-NOTES.html
jdk1.7.0_79/db/bin/
jdk1.7.0_79/db/bin/setNetworkClientCP

jdk1.7.0_79/db/bin/startNetworkServer
Change owner of the jdk:
chown -R <<user>>:<<group>> <<folder>>
root@ubuntu:/home/arun/java# sudo chown -R arun:hadoop jdk1.7.0_79
root@ubuntu:/home/arun/java#
see the lock icon gone now.
Change all the folder beneath to share common hadoop group permission

root@ubuntu:/home/arun/java# sudo chown -R arun:hadoop jdk1.7.0_79/bin/*
root@ubuntu:/home/arun/java#
root@ubuntu:/home/arun/java#sudo chmod 777
still no such file or directory
bash: /home/arun/java/jdk1.7.0_79/bin/java: No such file or directory
You get this error because you try to run a 32-bit executable on a 64-bit operating system.
And the message No such file or directory does not refer to your executable file called a.
Instead the error it refers to a helper program that's needed to run the 32-bit dynamically linked
executable.
After installation to jdk 64 version it is working fine!!!

chown -R <<user>>:<<group>> <<folder>>
root@ubuntu:/home/arun/hadoop# sudo chown -R arun:hadoop ./
change the permission of the folder hadoop-2.5.0 and other sub-folder beneath to hadoop
group.as you can see below -lock icon is now not there nomore when comparing the folder above.

Set environment variable for hadoop:
export HADOOP_HOME=/home/arun/hadoop
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
install putty
arun@ubuntu:~/putty/putty-0.66$ ssh-keygen -t rsa -P “”
Generating public/private rsa key pair.

Enter file in which to save the key (/home/arun/.ssh/id_rsa): hadoop
Your identification has been saved in hadoop.
Your public key has been saved in hadoop.pub.
The key fingerprint is:
5c:a3:5a:fe:d1:95:ed:1b:a0:ef:95:7c:d7:d8:f3:b5 arun@ubuntu
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| o |
| . o . o |
| S .o .|
| + ...o+o|
| . . ... .*B|
| . .. . X|
| . .o E.|
+-----------------+
arun@ubuntu:~/putty/putty-0.66$
>press CTRL+H to view the hidden files
As you can see it is stored in hadoop .pub file in inside putty.

Create a folder hadoop key and Set the key as trusted key for remote login
hadoopkey does not get created with any file. Change the /etc/sysctl.conf files to allow
connection to establish.

You have to reboot your machine in order to make the changes take effect.
You can check whether IPv6 is enabled on your machine with the following command:
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
A return value of 0 means IPv6 is enabled, a value of 1 means disabled (that’s what we want).

Reboot the ubuntu
Try check the command again.
$ cat /proc/sys/net/ipv6/conf/all/disable_ipv6
0
if still not working change manually
root@ubuntu:/home/arun# nano /proc/sys/net/ipv6/conf/all/disable_ipv6
1
root@ubuntu:/home/arun/putty/putty-0.66# ssh localhost
ssh: connect to host localhost port 22: Connection refused
root@ubuntu:/home/arun/putty/putty-0.66# sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
Chain OUTPUT (policy ACCEPT)
root@ubuntu:/home/arun/putty/putty-0.66# sudo iptables -A INPUT -p tcp --dport ssh -j ACCEPT
root@ubuntu:/home/arun/putty/putty-0.66#

create a folder inside /home/arun/putty/putty-0.66/hadoopkey
where hadoopkey – newly created folder to copy the key
go inside the hadoop key and allow the key to be accepted as trustedkey.
arun@ubuntu:~/putty/putty-0.66/hadoopkey$ cat hadoop.pub >>authorized_keys
arun@ubuntu:~/putty/putty-0.66/hadoopkey$

check hadoop.pub is working and has got generated with key
then Set the key as trusted key for remote login:
now below you can see the authorized_keys is get generated toallow hand shake to happen

full steps to connect to ssh:
Install SSH server:
$ sudo apt-get install openssh-server
if not worked download tar and then copy to the folder and try below commands
Create a ssh-key without password:
$ ssh-keygen -t rsa -P “”
Set the key as trusted key for remote login:
Try to connect on localhost and accept the connection (mandatory)
$ ssh localhost
hadoop – file name under which key to be generated -inside folder /home/arun/putty/putty-

0.66/hadoopkey/
Enter file in which to save the key (/home/arun/.ssh/id_rsa): /home/arun/putty/putty-
0.66/hadoopkey/hadoop
/home/arun/putty/putty-0.66/hadoopkey/hadoop already exists.
Overwrite (y/n)? y
Your identification has been saved in /home/arun/putty/putty-0.66/hadoopkey/hadoop.
Your public key has been saved in /home/arun/putty/putty-0.66/hadoopkey/hadoop.pub.
42:fa:dd:7c:a3:22:2b:81:7f:69:c1:fd:c7:96:f7:1d arun@ubuntu
+--[ RSA 2048]----+
| |
| |
| . |
| o |
| .....S |
| . ..oo.o |
| . ..o..o.o. E |
| o = . .o=.. o|
| +.o ..o . .o|
+-----------------+
enable ssh port 22

uncomment this line and restart
below are the ssh commands and functionalities:
ssh(1) - The basic rlogin/rsh-like client program.
•sshd(8) - The daemon that permits you to login.
•ssh_config(5) - The client configuration file.
•sshd_config(5) - The daemon configuration file.
•ssh-agent(1) - An authentication agent that can store private keys.
•ssh-add(1) - Tool which adds keys to in the above agent.
•sftp(1) - FTP-like program that works over SSH1 and SSH2 protocol.
•scp(1) - File copy program that acts like rcp(1).
•ssh-keygen(1) - Key generation tool.
•sftp-server(8) - SFTP server subsystem (started automatically by sshd).
•ssh-keyscan(1) - Utility for gathering public host keys from a number of hosts.
•ssh-keysign(8) - Helper program for hostbased authentication.

Configuring OpenSSH
Config Files
~/.ssh/*, /etc/ssh/ssh_config, and /etc/ssh/sshd_config
There are no required changes to any of these files. However, you may wish to
view the /etc/ssh/ files and make any changes appropriate for the security of
your system. One recommended change is that you disable root login via ssh.
Execute the following command as the root user to disable root login via ssh:
echo "PermitRootLogin no" >> /etc/ssh/sshd_config
above command create a file sshd_config under /etc/ssh/
If you want to be able to log in without typing in your password, first create
~/.ssh/id_rsa and ~/.ssh/id_rsa.pub with ssh-keygen and then copy
~/.ssh/id_rsa.pub to ~/.ssh/authorized_keys on the remote computer that you
want to log into. You'll need to change REMOTE_USERNAME and
REMOTE_HOSTNAME for the username and hostname of the remote computer
and you'll also need to enter your password for the ssh-copy-id command to
succeed:
ssh-keygen &&
ssh-copy-id -i ~/.ssh/id_rsa.pub REMOTE_USERNAME@REMOTE_HOSTNAME
ssh-keygen &&
ssh-copy-id -i /home/arun/sshserver/hadoopkey/hadoop.pub arun@localhost
Once you've got passwordless logins working it's actually more secure than
logging in with a password (as the private key is much longer than most
people's passwords). If you would like to now disable password logins, as
the root user:
echo "PasswordAuthentication no" >> /etc/ssh/sshd_config &&

echo "ChallengeResponseAuthentication no" >> /etc/ssh/sshd_config
If you added LinuxPAM support and you want ssh to use it then you will need
to add a configuration file for sshd and enable use of LinuxPAM. Note, ssh only
uses PAM to check passwords, if you've disabled password logins these
commands are not needed. If you want to use PAM issue the following
commands as the root user:
sed 's@d/login@d/sshd@g' /etc/pam.d/login > /etc/pam.d/sshd &&
chmod 644 /etc/pam.d/sshd &&
echo "UsePAM yes" >> /etc/ssh/sshd_config
Additional configuration information can be found in the man pages
for sshd, ssh and ssh-agent.
Boot Script
To start the SSH server at system boot, install the /etc/rc.d/init.d/sshd init
script included in the blfs-bootscripts-20150924 package.
make install-sshd
Contents
Installed Programs:scp, sftp, slogin (symlink to ssh), ssh, ssh-add, ssh-agent,
ssh-copy-id, ssh-keygen, ssh-keyscan, and sshd
Installed Libraries:None
Installed Directories:/etc/ssh, /usr/share/doc/openssh-7.1p1, and /var/lib/sshd
Short Descriptions
scp is a file copy program that acts like rcp except it uses an encrypted
protocol.
sftp is an FTP-like program that works over the SSH1 and SSH2 protocols.
slogin is a symlink to ssh.
ssh is an rlogin/rsh-like client program except it uses an encrypted protocol.
sshd is a daemon that listens for ssh login requests.
ssh-add is a tool which adds keys to the ssh-agent.
ssh-agent is an authentication agent that can store private keys.
ssh-copy-id is a script that enables logins on remote machine using local keys.
ssh-keygen is a key generation tool.
ssh-keyscan is a utility for gathering

After this above commands sshd_config files created manually

Ubuntu install ssh manually:
root@ubuntu:/home/arun# ssh-keygen &&
> ssh-copy-id -i /home/arun/sshserver/hadoopkey/hadoop.pub arun@localhost
Enter file in which to save the key (/root/.ssh/id_rsa): /home/arun/sshserver/hadoopkey/hadoop.pub
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
passphrase too short: have 4 bytes, need > 4
Saving the key failed: /home/arun/sshserver/hadoopkey/hadoop.pub.
root@ubuntu:/home/arun# ssh-keygen && ssh-copy-id -i
/home/arun/sshserver/hadoopkey/hadoop.pub arun@localhost
Enter file in which to save the key (/root/.ssh/id_rsa): ^C
root@ubuntu:/home/arun# clear
passphrase too short: have 2 bytes, need > 4
Saving the key failed: /home/arun/sshserver/hadoopkey/hadoop.pub.
Enter file in which to save the key (/root/.ssh/id_rsa): ^C
root@ubuntu:/home/arun# clear
Your identification has been saved in /home/arun/sshserver/hadoopkey/hadoop.pub.
Your public key has been saved in /home/arun/sshserver/hadoopkey/hadoop.pub.pub.
d8:78:0e:96:07:f1:0d:29:62:aa:b3:68:90:42:ca:c4 root@ubuntu
+--[ RSA 2048]----+

| . .. |
| o .o.o |
|. o .... . |
| E. * |
|=o * S |
|B. . = |
|+o . |
|o. |
|. |
+-----------------+
create hadoop boot scripts
first extract the boot scripts after downloading from ssh site.
http://www.linuxfromscratch.org/blfs/view/svn/introduction/bootscripts.html
NOTE : for extract the tar file i.e not in format tar.gz it should be tar xvf <<fileName>>

try now create the boot script as per above step -copied below for
reference, then create boot script.
Boot Script
To start the SSH server at system boot, install the /etc/rc.d/init.d/sshd init
script included in the blfs-bootscripts-20150924 package.
make install-sshd
NOTE:
just download the boot script from site and follow the steps in makefile

TO install sshd :
just set values for this.
ETCDIR=/etc
LIBDIR=${DESTDIR}/lib/services
EXTDIR=${DESTDIR}${ETCDIR}
MODE=754
DIRMODE=755
CONFMODE=644

COMMAND:
install-sshd: create-dirs
install -m ${MODE} blfs/init.d/sshd ${EXTDIR}/rc.d/init.d/
ln -sf ../init.d/sshd ${EXTDIR}/rc.d/rc0.d/K30sshd
ln -sf ../init.d/sshd ${EXTDIR}/rc.d/rc3.d/S30sshd
hadoopbootscripts,hadoopkey folder are created manually.

If rc.d not exist create it mostly rc0.d ,rc1.d only exists.
root@ubuntu:/etc# export EXTDIR =/etc
export EXTDIR=/home/arun/sshserver/hadoopbootscripts
install -m 754 blfs/init.d/sshd ${EXTDIR}/rc.d/init.d/
just copy blfs from downloaded path and move to folder where to run
i just copied to home/arun/sshserver/hadoopbootscripts
rc.d – newly created empty folder(after running above command
files gets created inside)
Blfs-bootscripts-20150924- donwloaded from internet.
create a folder rc0.d , rc1.d,rc2.d,rc3.d,rc4.d,rc5.d,rc6.d inside rc.d folder

After running the command above see sshd files gets created automatically.

See run sucessfully.
STEP 1:
download boot script from internet
STEP 2:
from boot scriopt copy bsh blfs folder copy to /home/arun/sshserver/hadoopbootscripts/
STEP 3:
in /home/arun/sshserver/hadoopbootscripts/ create empty rc.d and iniside create 6 empty
folder with name init.d ,rc0.d , rc1.d,rc2.d,rc3.d,rc4.d,rc5.d,rc6.d inside rc.d folder
STEP 4:
run the command by setting the root dir as in env variable:
export EXTDIR=/home/arun/sshserver/hadoopbootscripts
install -m 754 blfs/init.d/sshd ${EXTDIR}/rc.d/init.d/
After running check files get generated inside the init.d, rc0.d, rc1.d,rc2.d,rc3.d,rc4.d,rc5.d,rc6.d

see run successfully press enter > else last rc6.d wont get generated.
TO check whether process named sshd is running:
arun@ubuntu:~/sshserver/hadoopbootscripts/rc.d/init.d$ ps aux | grep -i ssh
arun 1594 0.0 0.0 12576 36 ? Ss 05:21 0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch
--exit-with-session gnome-session --session=ubuntu
arun 2318 0.3 3.1 494120 24204 ? Sl 05:59 0:03 gedit /home/arun/sshserver/ssh/auth.h
arun 2526 0.0 0.1 9396 944 pts/4 S+ 06:13 0:00 grep --color=auto -i ssh

see from ipconfig virtual ipv4 address working.
arun@ubuntu:~$ ssh localhost
arun@ubuntu:~$ ssh arun@localhost
arun@ubuntu:~$ ssh arun@192.168.1.2
ssh: connect to host 192.168.1.2 port 22: Connection refused
arun@ubuntu:~$ ssh arun@192.168.1.2:80
ssh: Could not resolve hostname 192.168.1.2:80: Name or service not known
ssh: connect to host 192.168.1.2 port 22: Connection refused
^C
in ubuntu mostly dynamic ip is used if not configured to configure statically
NOTE :
in the above ipconfig
192.168.1.2 ipv4 config of windows ip only works 192.168.1.56 of virutal box wont work see
below screenshot vitual box ip not works!!!

after that check fire fox loading web pages see for me the above config works.
address should be same in the ipconfig in windows above. Also make sure the network adapter is
bridge adapter
To check the network interfaces

above static ip can be configured this way also

can check available hosts by this way

see still connection issue of ssh :
Enter file in which to save the key (/home/arun/.ssh/id_rsa):
/home/arun/putty/putty-0.66/hadoopkey/hadoop
go to user folder in this case arun

check inside arun to check whether public and private are generated.
To check the hidden file (CTRL-H) or ls -la to get the hidden file info
arun@ubuntu:~/.ssh$ ls -la
total 16
drwx------ 2 arun arun 4096 Nov 21 08:35 .
drwxr-xr-x 29 arun arun 4096 Nov 21 08:35 ..
-rw------- 1 arun arun 1766 Nov 21 08:36 id_rsa
-rw-r--r-- 1 arun arun 393 Nov 21 08:36 id_rsa.pub
arun@ubuntu:~/.ssh$ ls
id_rsa -privatekey
id_rsa.pub- public key

hduser@ubuntu:~$ /usr/local/hadoop/bin/hadoop namenode -format
hduser@ubuntu:~$ /usr/local/hadoop/bin/start-all.sh
hduser@ubuntu:/usr/local/hadoop$ jps
to check ubuntu supported packages.
arun@ubuntu:~$ apt-cache search openssh
libssl1.0.0 - SSL shared libraries
ssh-askpass-gnome - interactive X program to prompt users for a passphrase for ssh-add
openssh-client - secure shell (SSH) client, for secure access to remote machines
arun@ubuntu:~$
NOTE: if you don't know the exact package you can use apt-cache search<<key>>

uncomment all
uncomment canoncial version

see since it is commented it is blank
IMPORTANT:
Type lsb_release -sc to find out your release. You may repeat the commands with "deb-src"
instead of "deb" in order to install the source files.

Adding Repositories
Adding the Universe and Multiverse Repositories
Additional software repositories such as Universe and Multiverse can be enabled by
uncommenting the corresponding apt lines (i.e. delete the '#' at the beginning of the line). For
Universe, uncomment those lines:
•deb http://us.archive.ubuntu.com/ubuntu/ saucy universe
deb-src http://us.archive.ubuntu.com/ubuntu/ saucy universe
deb http://us.archive.ubuntu.com/ubuntu/ saucy-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ saucy-updates universe
There are four similar lines for 'multiverse'.
OR you may use the add-apt-repository command. If your release is 'saucy':
•sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ saucy universe
multiverse"
sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ saucy-updates
universe multiverse"
Depending on your location, you should replace 'us.' by another country code, referring to a
mirror server in your region. Check sources.list to see what is used!
Type lsb_release -sc to find out your release. You may repeat the commands with "deb-src"
instead of "deb" in order to install the source files.
Don't forget to retrieve the updated package lists:
•sudo apt-get update
Adding Partner Repositories
You can add the partner repositories by uncommenting the following lines in your
/etc/apt/sources.list file:
•deb http://archive.canonical.com/ubuntu saucy partner
deb-src http://archive.canonical.com/ubuntu saucy partner
Then update as before:
Be aware that the software contained within this repository is NOT open source.
Adding Other Repositories
There are some reasons for which you might want to add non-Ubuntu repositories to your list of
software sources. Caution: To avoid trouble with your sytem, only add repositories that are
trustworthy and that are known to work on Ubuntu systems!
•You can add custom software repositories by adding the apt repository line of your software
source to the end of thesources.list file. It should look something like this:
deb http://mirror3.ubuntulinux.nl/ hardy-seveas freenx
•Don't forget to make apt aware of your changes:

sudo apt-get update
Adding Launchpad PPA Repositories
Adding Launchpad PPA (Personal Package Archive) is possible conveniently via the
command: add-apt-repository. This command is similar to "addrepo" on Debian.
•The command updates your sources.list file or adds/edits files under sources.list.d/. Type man
add-apt-repository for detailed help.
•If a public key is required and available it is automatically downloaded and registered.
•Should be installed by default. On older or minimal Ubuntu releases, you may have to
install software-properties-common and/or python-software-properties first (sudo apt-get
install python-software-properties)
sudo add-apt-repository ppa:<repository-name>
Example: sudo add-apt-repository ppa:nhandler/ppa
Enabling Repositories with a (non-interactive) Script
This section seemed obsolete due to the add-apt-repository command, thus it has been
removed.
The Basics
Ubuntu uses apt for package management. Apt stores a list of repositories or software channels in
the file
/etc/apt/sources.list
and in any file with the suffix .list under the directory
/etc/apt/sources.list.d/
See man sources.list for more about this storage mechanism.
By editing these files from the command line, we can add, remove, or temporarily disable
software repositories.
• Note: It's always a good idea to backup a configuration file like sources.list before you edit
it. To do so, issue the following command:
sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup
Typically, the beginning of the file /etc/apt/sources.list looks like this:
# sources.list
#deb cdrom:[Ubuntu 13.10 _Saucy Salamander_ - Release i386 (20131016.1)]/ saucy
main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ch.archive.ubuntu.com/ubuntu/ saucy main restricted
deb-src http://ch.archive.ubuntu.com/ubuntu/ saucy main restricted
#...

Explanation of the Repository Format
•All the lines beginning with one or two hashes (#) are comments, for information only.
•The lines without hashes are apt repository lines. Here's what they say:
•deb: These repositories contain binaries or precompiled packages. These repositories are
required for most users.
•deb-src: These repositories contain the source code of the packages. Useful for developers.
•http://archive.ubuntu.com/ubuntu: The URI (Uniform Resource Identifier), in this case a
location on the internet. See the official mirror list or the self-maintained mirror list to find other
mirrors.•saucy is the release name or version of your distribution.
•main & restricted are the section names or components. There can be several section names,
separated by spaces.
Other Versions
IMPORTANT
For other Ubuntu releases you would replace the 'saucy' with the current version you
have installed ('precise', 'quantal', 'raring', 'saucy', 'trusty', ...) Type lsb_release -sc to
find out your release.
Since our release is precise
root@ubuntu:/home/arun# nano /etc/bash.bashrc
root@ubuntu:/home/arun# nano /etc/apt/sources.list
root@ubuntu:/home/arun# lsb_release -sc
precise
deb http://us.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise universe
deb http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates universe
sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ precise universe
multiverse"
sudo add-apt-repository "deb http://us.archive.ubuntu.com/ubuntu/ precise-updates
universe multiverse"
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
Depending on your location, you should replace 'us.' by another country code, referring to a
mirror server in your region. Check sources.list to see what is used!
Best mirror server for location can be find from software uptodate

select best server for your location:

newly some server to sources.list above commented with #newly added us server
Important to refresh otherwise wont reflect
Don't forget to retrieve the updated package lists:

You can add custom software repositories by adding the apt repository line of your software
source to the end of thesources.list file. It should look something like this:
deb http://mirror3.ubuntulinux.nl/ hardy-seveas freenx
•Don't forget to make apt aware of your changes:
sudo apt-get update
Adding Launchpad PPA Repositories
Adding Launchpad PPA (Personal Package Archive) is possible conveniently via the
command: add-apt-repository. This command is similar to "addrepo" on Debian.
•The command updates your sources.list file or adds/edits files under sources.list.d/. Type man
add-apt-repository for detailed help.
•If a public key is required and available it is automatically downloaded and registered.
•Should be installed by default. On older or minimal Ubuntu releases, you may have to
install software-properties-common and/or python-software-properties first (sudo apt-get
install python-software-properties)
sudo add-apt-repository ppa:<repository-name>
Example: sudo add-apt-repository ppa:nhandler/ppa

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