UbuntuServer12.04 install JRE

UbuntuServer12.04 install JRE1, JRE version is officially released by Oracle serverjre72008,: http://download.oracle.com/otn-pub/java/jdk/7u21-b11/server-jre-7u21-linux-x64.tar.gz? AuthParam = 1369042105_ccb07d81f8301455441aae96f

Install JRE on Ubuntu Server 12.04

1. JRE version is officially released by Oracle server jre 72008,: http://download.oracle.com/otn-pub/java/jdk/7u21-b11/server-jre-7u21-linux-x64.tar.gz? AuthParam = 1369042105_ccb07d81f8301455441aae96ff455be1.

2. Upload the jre to the user root directory.

3. decompress the compressed package

Tar-xzf server-jre-7u21-linux-x64.gz

Get the folder named jdk1.7.0 _ 21.

4. Create/usr/local/java directory

Cd/usr/local

Sudo mkdir java

5. Change ~ /Jdk1.7.0 _ 21 copy to/usr/local/java directory

Sudo mv ~ /Jdk1.7.0 _ 21/usr/local/java

6. Access/usr/local/java

Cd/usr/local/java

7. Change the users and user groups of all files in/usr/local/java to root.

Sudo chown-R root.

Sudo chgrp-R root.

8. Add permanent system environment variables

1. Get the root permission: sudo su-

2. edit/etc/profile: vi/etc/profile.

3. Add the following command at the bottom of/etc/profile:

JAVA_HOME =/usr/local/java/jdk1.7.0 _ 21 # note the path here Export JAVA_HOME PATH = $ JAVA_HOME/bin: $ PATH Export PATH CLASSPATH =.: $ JAVA_HOME/lib/dt. jar: $ JAVA_HOME/lib/tools. jar Export CLASSPATH

4. Save and exit: esc: wq

9. Make the environment variable take effect

Source/etc/profile

10. Check whether the installation is successful.

Java-version

Javac-version

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