Install MySQL on Ubuntu 16.04

#1 

On Ubuntu 16.04, only the latest version of MySQL is included in the APT package repository by default. Mean time that's MySQL 5.7

To install it, simply update the package index on your server and install the default package with
apt-get.

#sudo apt-get update
#sudo apt-get install mysql-server
#root@mayank-VirtualBox:~# sudo apt-get update

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AppStream cache update completed, but some metadata was ignored due to errors.
Reading package lists... Done

#root@mayank-VirtualBox:~# sudo apt-get install mysql-server
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libaio1 libevent-core-2.0-5 libhtml-template-perl mysql-client-5.7 mysql-client-core-5.7 mysql-common
  mysql-server-5.7 mysql-server-core-5.7
Suggested packages:
  libipc-sharedcache-perl mailx tinyca
The following NEW packages will be installed:
  libaio1 libevent-core-2.0-5 libhtml-template-perl mysql-client-5.7 mysql-client-core-5.7 mysql-common
  mysql-server mysql-server-5.7 mysql-server-core-5.7
0 upgraded, 9 newly installed, 0 to remove and 449 not upgraded.
Need to get 18.1 MB of archives.
After this operation, 157 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 mysql-common all 5.7.17-0ubuntu0.16.04.2 [15.7 kB]
Get:2 http://in.archive.ubuntu.com/ubuntu xenial/main i386 libaio1 i386 0.3.110-2 [6,646 B]
Get:3 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 mysql-client-core-5.7 i386 5.7.17-0ubuntu0.16.04.2 [6,104 kB]
Get:4 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 mysql-client-5.7 i386 5.7.17-0ubuntu0.16.04.2 [1,739 kB]
Get:5 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 mysql-server-core-5.7 i386 5.7.17-0ubuntu0.16.04.2 [7,513 kB]
Get:6 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 libevent-core-2.0-5 i386 2.0.21-stable-2ubuntu0.16.04.1 [75.7 kB]
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Get:8 http://in.archive.ubuntu.com/ubuntu xenial/main i386 libhtml-template-perl all 2.95-2 [60.4 kB]   
Get:9 http://in.archive.ubuntu.com/ubuntu xenial-updates/main i386 mysql-server all 5.7.17-0ubuntu0.16.04.2 [10.8 kB]
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Preconfiguring packages ...
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Processing triggers for libc-bin (2.23-0ubuntu3) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up mysql-common (5.7.17-0ubuntu0.16.04.2) ...
update-alternatives: using /etc/mysql/my.cnf.fallback to provide /etc/mysql/my.cnf (my.cnf) in auto mode
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Setting up libaio1:i386 (0.3.110-2) ...
Setting up mysql-client-core-5.7 (5.7.17-0ubuntu0.16.04.2) ...
Setting up mysql-client-5.7 (5.7.17-0ubuntu0.16.04.2) ...
Setting up mysql-server-core-5.7 (5.7.17-0ubuntu0.16.04.2) ...
Setting up libevent-core-2.0-5:i386 (2.0.21-stable-2ubuntu0.16.04.1) ...
Setting up mysql-server-5.7 (5.7.17-0ubuntu0.16.04.2) ...
update-alternatives: using /etc/mysql/mysql.cnf to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Renaming removed key_buffer and myisam-recover options (if present)
Setting up libhtml-template-perl (2.95-2) ...
Setting up mysql-server (5.7.17-0ubuntu0.16.04.2) ...
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Prompt to create a root password during the installation. Choose a secure one and make sure you remember it,

because you'll need it later. 




#2 Configuring MySQL

For fresh installations, you'll want to run the included security script. This changes some of the less secure 

default options for things like remote root logins and sample users. On older versions of MySQL, you needed to initialize 

the data directory manually as well,but this is done automatically now.






Run the security script.
#sudo mysql_secure_installation
This will prompt you for the root password you created in Step 1. You can press Y and then ENTER
to accept the defaults for all the subsequent questions, with the exception of the one that asks if you'd like to change the root
password. You just set it in Step 1, so you don't have to change it now. To initialize the MySQL data directory, you would use

mysql_install_db for versions before 5.7.6, and mysqld --initialize for 5.7.6 and later. However, if you installed MySQL

from the Debian distribution, like in Step 1, the data directory was initialized automatically; you don't have to do anything.

If you try running the command anyway, you'll see the following error:

#root@mayank-VirtualBox:~# sudo mysql_secure_installation

Securing the MySQL server deployment.

Enter password for user root: 

VALIDATE PASSWORD PLUGIN can be used to test passwords and improve security. It checks the strength of password

and allows the users to set only those passwords which are secure enough. Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:

LOW    Length >= 8

MEDIUM Length >= 8, numeric, mixed case, and special characters

STRONG Length >= 8, numeric, mixed case, special characters and
dictionary                  file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0

Using existing password for root.

Estimated strength of the password: 25 

Change the password for root ? ((Press y|Y for Yes, any other key
for No) : k

 ... skipping.

By default, a MySQL installation has an anonymous user,allowing anyone to log into MySQL without having to have

a user account created for them. This is intended only for testing, and to make the installation go a bit smoother.

You should remove them before moving into a production environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No)
: y

Success.

Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at

the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key
for No) : n

 ... skipping.

By default, MySQL comes with a database named 'test' that anyone can access. This is also intended only for testing,

and should be removed before moving into a production environment.

Remove test database and access to it? (Press y|Y for Yes, any
other key for No) : y

 - Dropping test database...

Success.

 - Removing privileges on test database...

Success.

Reloading the privilege tables will ensure that all changes made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for
No) : y

Success.

All done! 








#3 Testing MySQL
Regardless of how you installed it, MySQL should have started running automatically. To test this, check its status.

systemctl status mysql.service
#root@mayank-VirtualBox:~# systemctl status mysql.service

● mysql.service -
MySQL Community Server

   Loaded: loaded
(/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)

   Active: active
(running) since Fri 2017-04-14 20:30:43 IST; 9min ago

 Main PID: 16438
(mysqld)

Tasks: 28 (limit:512)

CGroup:/system.slice/mysql.service





           └─16438
/usr/sbin/mysqld

mayank-VirtualBox systemd[1]: Starting MySQL Community Server...

mayank-VirtualBox systemd[1]: Started MySQL Community Server.

If MySQL isn't running, you can start it with sudo systemctl

mysql start.

For an additional check, you can try connecting to the database using the mysqladmin tool, 

which is a client that lets you run administrative commands. For example, this
command says to connect to MySQL as root (-u root), prompt for a password (-p),
and return the version.

mysqladmin -p -u root version

#root@mayank-VirtualBox:~# systemctl status mysql.service

● mysql.service -
MySQL Community Server

   Loaded: loaded
(/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)

   Active: active
(running) since Fri 2017-04-14 20:30:43 IST; 9min ago

 Main PID: 16438
(mysqld)

 Tasks: 28 (limit:512)

   CGroup:/system.slice/mysql.service





           └─16438
/usr/sbin/mysqld




#mayank-VirtualBox systemd[1]: Starting MySQL Community Server...


mayank-VirtualBox systemd[1]: Started MySQL Community Server.

#root@mayank-VirtualBox:~# mysql -u root -p





Enter password: 


Welcome to the MySQL
monitor.  Commands end with ; or \g.

Your MySQL connection
id is 9

Server version:
5.7.17-0ubuntu0.16.04.2 (Ubuntu)

Copyright (c) 2000,

2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered
trademark of Oracle Corporation and/or its

affiliates. Other
names may be trademarks of their respective

owners.

Type 'help;' or '\h'

for help. Type '\c' to clear the current input statement.

#mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sys                |

+--------------------+

4 rows in set (0.00 sec)





mysql>Exit

Installation of JRE/JDK in Ubuntu 16.04

Installing and Managing versions of Java 

 #1  sudo -s

sudo is short for 'superuser do' meaning 'execute the following command as the superuser'. Thus, it grants the humble user root privileges for one command and any commands triggered by that command.However, Ubuntu does not include the root user. Instead, administrative access is given to individual users, who may use the "sudo" application to perform administrative tasks. The first user account you created on your system during installation will, by default, have access to sudo

#mayank@mayank-VirtualBox:~$ sudo -s

#root@mayank-VirtualBox:~# 

#2 sudo apt-get update

#root@mayank-VirtualBox:~# sudo apt-get update

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Reading package lists... Done

#3 Check for Java already installed:  java -version

#root@mayank-VirtualBox:~# java -version

The program 'java' can be found in the following packages:

* default-jre

* gcj-4.9-jre-headless

* gcj-5-jre-headless

* openjdk-8-jre-headless

* gcj-4.8-jre-headless

* openjdk-9-jre-headless

Try: apt install <selected package>

The program java can be found in the following packages", Java hasn't been installed

#root@mayank-VirtualBox:~# sudo apt-get install default-jre

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

ca-certificates-java default-jre-headless fonts-dejavu-extra java-common

libbonobo2-0 libbonobo2-common libgif7 libgnome-2-0 libgnome2-common

libgnomevfs2-0 libgnomevfs2-common liborbit-2-0 openjdk-8-jre

openjdk-8-jre-headless

Suggested packages:...

Will install the Java Runtime Environment-JRE. If you instead need the Java Development Kit -JDK, which is needed to compile Java applications

#root@mayank-VirtualBox:~# sudo apt-get install default-jdk

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

default-jdk-headless libice-dev libpthread-stubs0-dev libsm-dev libx11-dev

libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxt-dev openjdk-8-jdk

openjdk-8-jdk-headless x11proto-core-dev x11proto-input-dev x11proto-kb-dev

xorg-sgml-doctools xtrans-dev

Suggested packages:

libice-doc libsm-doc libxcb-doc libxt-doc openjdk-8-demo openjdk-8-source visualvm

The following NEW packages will be installed:

default-jdk default-jdk-headless libice-dev libpthread-stubs0-dev libsm-dev

libx11-dev libx11-doc libxau-dev libxcb1-dev libxdmcp-dev libxt-dev openjdk-8-jdk

openjdk-8-jdk-headless x11proto-core-dev x11proto-input-dev x11proto-kb-dev

xorg-sgml-doctools xtrans-dev

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...

#root@mayank-VirtualBox:~# sudo apt-get install python-software-properties

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

python-apt python-pycurl

Suggested packages:

python-apt-dbg python-apt-doc libcurl4-gnutls-dev python-pycurl-dbg

python-pycurl-doc

The following NEW packages will be installed:

python-apt python-pycurl python-software-properties

0 upgraded, 3 newly installed, 0 to remove and 449 not upgraded.

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Do you want to continue? [Y/n] y

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Setting up python-software-properties (0.96.20.5) ...

#root@mayank-VirtualBox:~# sudo add-apt-repository ppa:webupd8team/java

Oracle Java (JDK) Installer (automatically downloads and installs Oracle JDK7 / JDK8 / JDK9). There are no actual Java files in this PPA.

More info (and Ubuntu installation instructions):

- for Oracle Java 7: http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html

- for Oracle Java 8: http://www.webupd8.org/2012/09/install-oracle-java-8-in-ubuntu-via-ppa.html

Debian installation instructions:

- Oracle Java 7: http://www.webupd8.org/2012/06/how-to-install-oracle-java-7-in-debian.html

- Oracle Java 8: http://www.webupd8.org/2014/03/how-to-install-oracle-java-8-in-debian.html

Oracle Java 9 (for both Ubuntu and Debian): http://www.webupd8.org/2015/02/install-oracle-java-9-in-ubuntu-linux.html

For JDK9, the PPA uses standard builds from: https://jdk9.java.net/download/ (and not the Jigsaw builds!).

Important!!! For now, you should continue to use Java 8 because Oracle Java 9 is available as an early access release! You should only use Oracle Java 9 if you explicitly need it, because it may contain bugs and it might not include the latest security patches! Also, some Java options were removed in JDK9, so you may encounter issues with various Java apps. More information and installation instructions (Ubuntu / Linux Mint / Debian): http://www.webupd8.org/2015/02/install-oracle-java-9-in-ubuntu-linux.html

More info: https://launchpad.net/~webupd8team/+archive/ubuntu/java

Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keyring `/tmp/tmp31cg0nvp/secring.gpg' created

gpg: keyring `/tmp/tmp31cg0nvp/pubring.gpg' created

gpg: requesting key EEA14886 from hkp server keyserver.ubuntu.com

gpg: /tmp/tmp31cg0nvp/trustdb.gpg: trustdb created

gpg: key EEA14886: public key "Launchpad VLC" imported

gpg: no ultimately trusted keys found

gpg: Total number processed: 1

gpg: imported: 1 (RSA: 1)

#sudo apt-get update

#root@mayank-VirtualBox:~# sudo apt-get update

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Reading package lists... Done

JDK 7

The Latest Stable Version.

#sudo apt-get install oracle-java7-installer

root@mayank-VirtualBox:~# sudo apt-get install oracle-java7-installer

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

gsfonts-x11

Suggested packages:

binfmt-support visualvm ttf-baekmuk | ttf-unfonts | ttf-unfonts-core ttf-kochi-gothic

| ttf-sazanami-gothic ttf-kochi-mincho | ttf-sazanami-mincho ttf-arphic-uming

The following NEW packages will be installed:

gsfonts-x11 oracle-java7-installer

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Setting up oracle-java7-installer (7u80+7u60arm-0~webupd8~1) ...

Downloading Oracle Java 7...

--2017-04-14 17:35:58-- http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-i586.tar.gz

Resolving download.oracle.com (download.oracle.com)... 23.32.28.209, 23.32.28.200

Connecting to download.oracle.com (download.oracle.com)|23.32.28.209|:80... connected.

HTTP request sent, awaiting response... 302 Moved Temporarily

Location: https://edelivery.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-i586.tar.gz [following]

--2017-04-14 17:36:02-- https://edelivery.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-i586.tar.gz

Resolving edelivery.oracle.com (edelivery.oracle.com)... 104.120.92.211, 2600:140f:5:184::2d3e, 2600:140f:5:182::2d3e

Connecting to edelivery.oracle.com (edelivery.oracle.com)|104.120.92.211|:443... connected.

HTTP request sent, awaiting response... 302 Moved Temporarily

Location: http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-i586.tar.gz?AuthParam=1492171684_bd84ed58cd1a587fe488781285ce4611 [following]

--2017-04-14 17:36:04-- http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-i586.tar.gz?AuthParam=1492171684_bd84ed58cd1a587fe488781285ce4611

Connecting to download.oracle.com (download.oracle.com)|23.32.28.209|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 154850445 (148M) [application/x-gzip]

Saving to: ‘jdk-7u80-linux-i586.tar.gz’

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55296K ........ ........ ........ ........ ........ ........ 38% 559K 2m39s      58368K ........ ........ ........ ........ ........ ........ 40% 552K 2m35s

61440K ........ ........ ........ ........ ........ ........ 42% 569K 2m29s      64512K ........ ........ ........ ........ ........ ........ 44% 672K 2m23s

67584K ........ ........ ........ ........ ........ ........ 46% 700K 2m17s      70656K ........ ........ ........ ........ ........ ........ 48% 714K 2m11s

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147456K ........ ........ ........ ........ ........ ........ 99% 661K 1s            150528K ........ .. 100% 654K=4m19s

2017-04-14 17:40:24 (584 KB/s) - ‘jdk-7u80-linux-i586.tar.gz’ saved [154850445/154850445]

Download done.

Removing outdated cached downloads...

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/ControlPanel to provide /usr/bin/ControlPanel (ControlPanel) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/java to provide /usr/bin/java (java) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/java_vm to provide /usr/bin/java_vm (java_vm) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/javaws to provide /usr/bin/javaws (javaws) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/jcontrol to provide /usr/bin/jcontrol (jcontrol) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/keytool to provide /usr/bin/keytool (keytool) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/orbd to provide /usr/bin/orbd (orbd) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/pack200 to provide /usr/bin/pack200 (pack200) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/policytool to provide /usr/bin/policytool (policytool) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/rmid to provide /usr/bin/rmid (rmid) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/rmiregistry to provide /usr/bin/rmiregistry (rmiregistry) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/servertool to provide /usr/bin/servertool (servertool) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/tnameserv to provide /usr/bin/tnameserv (tnameserv) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/unpack200 to provide /usr/bin/unpack200 (unpack200) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/lib/jexec to provide /usr/bin/jexec (jexec) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/appletviewer to provide /usr/bin/appletviewer (appletviewer) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/extcheck to provide /usr/bin/extcheck (extcheck) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/idlj to provide /usr/bin/idlj (idlj) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jar to provide /usr/bin/jar (jar) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jarsigner to provide /usr/bin/jarsigner (jarsigner) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/javac to provide /usr/bin/javac (javac) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/javadoc to provide /usr/bin/javadoc (javadoc) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/javafxpackager to provide /usr/bin/javafxpackager (javafxpackager) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/javah to provide /usr/bin/javah (javah) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/javap to provide /usr/bin/javap (javap) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jcmd to provide /usr/bin/jcmd (jcmd) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jconsole to provide /usr/bin/jconsole (jconsole) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jdb to provide /usr/bin/jdb (jdb) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jhat to provide /usr/bin/jhat (jhat) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jinfo to provide /usr/bin/jinfo (jinfo) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jmap to provide /usr/bin/jmap (jmap) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jmc to provide /usr/bin/jmc (jmc) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jps to provide /usr/bin/jps (jps) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jrunscript to provide /usr/bin/jrunscript (jrunscript) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jsadebugd to provide /usr/bin/jsadebugd (jsadebugd) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jstack to provide /usr/bin/jstack (jstack) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jstat to provide /usr/bin/jstat (jstat) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jstatd to provide /usr/bin/jstatd (jstatd) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/jvisualvm to provide /usr/bin/jvisualvm (jvisualvm) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/native2ascii to provide /usr/bin/native2ascii (native2ascii) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/rmic to provide /usr/bin/rmic (rmic) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/schemagen to provide /usr/bin/schemagen (schemagen) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/serialver to provide /usr/bin/serialver (serialver) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/wsgen to provide /usr/bin/wsgen (wsgen) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/wsimport to provide /usr/bin/wsimport (wsimport) in auto mode

update-alternatives: using /usr/lib/jvm/java-7-oracle/bin/xjc to provide /usr/bin/xjc (xjc) in auto mode

Oracle JDK 7 installed

update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/lib/i386/libnpjp2.so to provide /usr/lib/mozilla/plugins/libjavaplugin.so (mozilla-javaplugin.so) in auto mode

Oracle JRE 7 browser plugin installed

Setting up gsfonts-x11 (0.24) ...

JDK 8

#sudo apt-get install oracle-java8-installer
#root@mayank-VirtualBox:~# sudo apt-get install oracle-java8-installer
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  oracle-java8-set-default
Suggested packages:
  binfmt-support visualvm ttf-baekmuk | ttf-unfonts | ttf-unfonts-core ttf-kochi-gothic
  | ttf-sazanami-gothic ttf-kochi-mincho | ttf-sazanami-mincho ttf-arphic-uming
The following NEW packages will be installed:
  oracle-java8-installer oracle-java8-set-default
0 upgraded, 2 newly installed, 0 to remove and 449 not upgraded.
Need to get 39.5 kB of archives.
After this operation, 138 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://ppa.launchpad.net/webupd8team/java/ubuntu xenial/main i386 oracle-java8-installer all 8u121-1~webupd8~2 [32.9 kB]
Get:2 http://ppa.launchpad.net/webupd8team/java/ubuntu xenial/main i386 oracle-java8-set-default all 8u121-1~webupd8~2 [6,612 B]
Fetched 39.5 kB in 0s (41.2 kB/s)              
Preconfiguring packages ...
Selecting previously unselected package oracle-java8-installer.
(Reading database ... 174535 files and directories currently installed.)
Preparing to unpack .../oracle-java8-installer_8u121-1~webupd8~2_all.deb ...
oracle-license-v1-1 license has already been accepted
Unpacking oracle-java8-installer (8u121-1~webupd8~2) ...
Processing triggers for hicolor-icon-theme (0.15-0ubuntu1) ...
Processing triggers for shared-mime-info (1.5-2) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu3) ...
Processing triggers for desktop-file-utils (0.22-1ubuntu5) ...
Processing triggers for bamfdaemon (0.5.3~bzr0+16.04.20160415-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for mime-support (3.59ubuntu1) ...
Setting up oracle-java8-installer (8u121-1~webupd8~2) ...
No /var/cache/oracle-jdk8-installer/wgetrc file found.
Creating /var/cache/oracle-jdk8-installer/wgetrc and
using default oracle-java8-installer wgetrc settings for it.
Downloading Oracle Java 8...
--2017-04-14 17:44:54--  http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-i586.tar.gz
Resolving download.oracle.com (download.oracle.com)... 23.32.28.200, 23.32.28.209
Connecting to download.oracle.com (download.oracle.com)|23.32.28.200|:80... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://edelivery.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-i586.tar.gz [following]
--2017-04-14 17:44:54--  https://edelivery.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-i586.tar.gz
Resolving edelivery.oracle.com (edelivery.oracle.com)... 104.120.92.211, 2600:140f:5:184::2d3e, 2600:140f:5:182::2d3e
Connecting to edelivery.oracle.com (edelivery.oracle.com)|104.120.92.211|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-i586.tar.gz?AuthParam=1492172214_feb365fa6f803b13540afb817b563cca [following]
--2017-04-14 17:44:55--  http://download.oracle.com/otn-pub/java/jdk/8u121-b13/e9e7ea248e2c4826b92b3f075a80e441/jdk-8u121-linux-i586.tar.gz?AuthParam=1492172214_feb365fa6f803b13540afb817b563cca
Connecting to download.oracle.com (download.oracle.com)|23.32.28.200|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 185735871 (177M) [application/x-gzip]
Saving to: ‘jdk-8u121-linux-i586.tar.gz’

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178176K ........ ........ ........ ........ ........ ........ 99%  571K 0s           181248K ..                                                   100%  709K=4m51s
2017-04-14 17:49:46 (624 KB/s) - ‘jdk-8u121-linux-i586.tar.gz’ saved [185735871/185735871]
Download done.
Removing outdated cached downloads...
update-alternatives: using /usr/lib/jvm/java-8-oracle/bin/javapackager to provide /usr/bin/javapackager (javapackager) in auto mode
Oracle JRE 8 browser plugin installed
Oracle JDK 8 installed
#####Important########
To set Oracle JDK8 as default, install the "oracle-java8-set-default" package.
E.g.: sudo apt install oracle-java8-set-default
On Ubuntu systems, oracle-java8-set-default is most probably installed
automatically with this package.
######################
Selecting previously unselected package oracle-java8-set-default.
(Reading database ... 174563 files and directories currently installed.)
Preparing to unpack .../oracle-java8-set-default_8u121-1~webupd8~2_all.deb ...
Unpacking oracle-java8-set-default (8u121-1~webupd8~2) ...
Setting up oracle-java8-set-default (8u121-1~webupd8~2) ...



Managing Java Version

We have multiple Java installations on your Droplet, the Java version to use as default can be chosen. To do this, execute the following command:

#sudo update-alternatives --config java

It will usually return something like this if you have 2 installations (if you have more, it will of course return more):

There are 2 choices for the alternative java (providing /usr/bin/java).
Selection    Path                                            Priority   Status
------------------------------------------------------------
* 0            /usr/lib/jvm/java-7-oracle/jre/bin/java          1062      auto mode
  1            /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java   1061      manual mode
  2            /usr/lib/jvm/java-7-oracle/jre/bin/java          1062      manual mode
Press enter to keep the current choice[*], or type selection number:

You can now choose the number to use as default. This can also be done for the Java compiler (javac):

#sudo update-alternatives --config javac

This command can be executed for all other commands which have different installations. In Java, this includes but is not limited to: keytool, javadoc and jarsigner.

#root@mayank-VirtualBox:~# sudo update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).
  Selection    Path                                           Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-7-oracle/jre/bin/java         1082      auto mode
  1            /usr/lib/jvm/java-7-oracle/jre/bin/java         1082      manual mode
  2            /usr/lib/jvm/java-8-openjdk-i386/jre/bin/java   1081      manual mode
* 3            /usr/lib/jvm/java-8-oracle/jre/bin/java         1081      manual mode
Press <enter> to keep the current choice[*], or type selection number: 3

/usr/lib/jvm/java-7-oracle

Copy the path from your preferred installation and then edit the file /etc/environment:

sudo nano /etc/environment

In this file, add the following line (replacing YOUR_PATH by the just copied path):

JAVA_HOME="YOUR_PATH"

That should be enough to set the environment variable. Now reload this file:

source /etc/environment

Test it by executing:

echo $JAVA_HOME

If it returns the just set path, the environment variable has been set successfully. If it doesn't, please make sure you followed all steps correctly.

#root@mayank-VirtualBox:~# sudo update-alternatives --config java
There are 3 choices for the alternative java (providing /usr/bin/java).
  Selection    Path                                           Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-7-oracle/jre/bin/java         1082      auto mode
  1            /usr/lib/jvm/java-7-oracle/jre/bin/java         1082      manual mode
  2            /usr/lib/jvm/java-8-openjdk-i386/jre/bin/java   1081      manual mode
* 3            /usr/lib/jvm/java-8-oracle/jre/bin/java         1081      manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/lib/jvm/java-7-oracle/jre/bin/java to provide /usr/bin/java (java) in manual mode

#root@mayank-VirtualBox:~# sudo nano /etc/environment


#root@mayank-VirtualBox:~# java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) Client VM (build 24.80-b11, mixed mode)

#root@mayank-VirtualBox:~# source /etc/environment
#root@mayank-VirtualBox:~# echo $JAVA_HOME
/usr/lib/jvm/java-7-oracle