Quick setup JDK 1.8 on Ubuntu 16.04

In this post, I am going to write about quick setup of JDK 8 on Ubuntu Linux 16.04 assuming a fresh installation of Linux and on the top of that java needs to be installed. 

Below are the steps for quick installation of JDK 1.8_x on Ubuntu Linux-

1. Login to your ubuntu linux machine as root user
2. Create a new directory at location / and provide necessary permission for read write and navigate to /u01

root@ubuntu:~

root@ubuntu:~ mkdir u01/

root@ubuntu:~ chmod 664 /u01

root@ubuntu:~ cd /u01

3. Download the Linux Compressed Archive archive from Oracle Official page- https://www.oracle.com/in/java/technologies/javase/javase-jdk8-downloads.html

Or just open the command line and use curl to download the same. For this you need a valid AuthParam because you need to be logged in to Oracle.com. So if you have and Oracle.com account just login and proceed to downloads page as specified in above link, go to respective download section and click on the download link. Now just copy the link from downloads bar and use the same for CURL GET request as shown below-

root@ubuntu:~ cd /u01 curl -X GET https://download.oracle.com/otn/java/jdk/8u251-b08/3d5a2bb8f8d4428bbe94aed7ec7ae784/jdk-8u251-linux-i586.tar.gz?AuthParam=1590566343_ac34e683ddfa497348ddc52c8241638e

Now check the same once completed-

root@ubuntu:~ ls -lrth
root@ubuntu:~ cd /u01 curl -X GET

total 186M

-rw-r--r-- 1 root root 186M Mth xx xx:xx jdk-8u251-linux-x64.tar.gz 

4. Extract the archive as

tar -xvf jdk-8u231-linux-x64.tar.gz 

Check the directory created inside u01 as-

root@ubuntu:/u01# ls -lrth

total 186M

drwxr-xr-x 7 uucp  143 4.0K Oct  5  2019 jdk1.8.0_251

-rw-r--r-- 1 root root 186M May xx 02:22 jdk-8u251-linux-x64.tar.gz

So our JDK has been extracted to a directory called jdk1.8.0_251.

5. Do entry of JDK path in bash_profile
root@ubuntu:/u01# vi ~/.bash_profile

export JAVA_HOME=/u01/jdk1.8.0_251

export PATH=$PATH:$JAVA_HOME/bin

Save it and quit.

5. Checking Java version

Now our JDK path has been set. Either reboot the machine for bash profile changes impact or source it as

root@ubuntu:/u01# source ~/.bash_profile

Now check your java version as-

root@ubuntu:~ java -version

java version "1.8.0_231"

Java(TM) SE Runtime Environment (build 1.8.0_251-b13)

Java HotSpot(TM) 64-Bit Server VM (build 25.251-b13, mixed mode)

Congratulations! We have our JDK 1.8.x successfully setup on Ubuntu Linux 16.04.