HadoopConfiguration

1. Install JAVA


2. 
thanooj@thanooj-Inspiron-3521:~$ sudo addgroup hadoop
Adding group `hadoop' (GID 1001) ...
Done.
thanooj@thanooj-Inspiron-3521:~$ sudo adduser --ingroup hadoop hadoopuser
Adding user `hadoopuser' ...
Adding new user `hadoopuser' (1001) with group `hadoop' ...
Creating home directory `/home/hadoopuser' ...
Copying files from `/etc/skel' ...
Enter new UNIX password: 
Retype new UNIX password: 
passwd: password updated successfully
Changing the user information for hadoopuser
Enter the new value, or press ENTER for the default
	Full Name []: 
	Room Number []: 
	Work Phone []: 
	Home Phone []: 
	Other []: 
Is the information correct? [Y/n] Y
thanooj@thanooj-Inspiron-3521:~$ 
thanooj@thanooj-Inspiron-3521:~$ su - hadoopuser
Password: 
hadoopuser@thanooj-Inspiron-3521:~$ ssh-keygen -t rsa -P ""
Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoopuser/.ssh/id_rsa): 
Created directory '/home/hadoopuser/.ssh'.
Your identification has been saved in /home/hadoopuser/.ssh/id_rsa.
Your public key has been saved in /home/hadoopuser/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:28Lp2Y8cp51I4Jt8C5/7f7tmHl9tEOKqm59UwDl6Hkw hadoopuser@thanooj-Inspiron-3521
The key's randomart image is:
+---[RSA 2048]----+
|                 |
|         . .     |
|          E . .  |
|         + + . . |
|        S + o .  |
|       o B +   ..|
|        B B .  .+|
|       o #.X . +=|
|        X+&==.==+|
+----[SHA256]-----+
hadoopuser@thanooj-Inspiron-3521:~$ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
hadoopuser@thanooj-Inspiron-3521:~$ ssh localhost
The authenticity of host 'localhost (127.0.0.1)' can't be established.
ECDSA key fingerprint is SHA256:LMWwdw55yUq2Z4qZAkWTKPwB7FGFYjSADR+YFuwMA8I.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
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