Installing Java 8 on Ubuntu
$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java8-installer
Verify Installed Java Version :
$ java -version
Configuring Java Environment
Install this package using following command.
$ sudo apt-get install oracle-java8-set-default
Install "Guest Additions" on Oracle VirtualBox
- Select from the top menu: VirtualBox -> Devices -> Insert Guest Additions CD image
- In Ubuntu open a terminal, navigate to cd folder (usually /media/VBOXADDITIONS*) and run
$ sudo sh ./VBoxLinuxAdditions.run
$ sudo usermod -a -G vboxsf darren
(and replace ‘darren’ with your username)
* NOTE: the change will only be visible once you logout and login again!
https://www.virtualbox.org/manual/ch04.html
Expanding virtual harddisk to 20GB
VBoxManage.exe modifyhd "C:\Users\jini\VirtualBox VMs\Ubuntu14\Ubuntu14.vdi" --resize 20480
Set Environment Variable @ home directory
gedit .bashrc (at home directory) or gedit /etc/profile
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
export HADOOP_HOME=/usr/local/hadoop
export HADOOP_PREFIX=/usr/local/hadoop
export PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$HADOOP_HOME/bin
export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
SSH Configuration
$ sudo apt-get install openssh-server
$ ssh-keygen -t rsa -P ""
$ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
$ Verify => ssh localhost /ssh -v localhost /sudo restart ssh
Open CL Terminal =>> Use Ctrl+Alt+t
Clear CL Screen => $ clear
View Env variable => $ echo $JAVA_HOME
Remove directory recursively as administrator => $ sudo rm -R [Directory name]
List contents => $ ls -al
Copy file to current directory => $ sudo cp /media/sf_mywork/jdk-8u71-linux-i586.tar.gz .
Untar commpressed file => $ sudo tar -zxf jdk-8u71-linux-i586.tar.gz
Rename file => $ sudo mv jdk1.8.0_71 java
Change permission recursively => $ sudo chmod -R 777 /usr/local/hadoop
