After changing any environment settings, you have to log off to let the changes take effect.
Quick notes on vi:
1) Start vi
vi <filename>
2) Browse
:$ -- Last line
:0 -- First line
3) Insert
i <changes> Esc
4) Copy-Paste
yy -- copy current line
yNy -- copy N lines
p -- paste
5) Search
/<str> -- search for <str>
6) Exit vi:
:x -- to eXit (save+quit)
:q -- to quit
:q! -- to quit without save
>
> On 08/28/2012 02:21:51 PM AwsEC2 wrote:
Download a JDK RPM from http://www.oracle.com/technetwork/java/javase/downloads/index.html. Look for "linux-x64-rpm" and download JDK 64-bit version from http://download.oracle.com/otn-pub/java/jdk/6u34-b04/jdk-6u34-linux-x64-rpm.bin
Step 1). Make the folder available
# mkdir /usr/local/java
# cd /usr/local
# chmod 777 java
Step 2). Upload the downloaded JDK by WinSCP
Copy jdk-6u34-linux-x64-rpm.bin onto /usr/local/java/
Step 3). Install JDK
Then follow the instructions on http://alwajdi.blogspot.com/2007/12/how-to-install-snns-jdk-in-fedora-8.html to install the downloaded JDK.
# chmod 755 jdk-6u34-linux-x64-rpm.bin
# ./jdk-6u34-linux-x64-rpm.bin
Note: The installed JDK jdk1.6.0_34 will be under /usr/java/
Step 4). Override the default JDK link
The AWS-Linux instance comes with a built-in JDK. You can find it out by:
$ java -version
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.3) (amazon-52.1.11.3.45.amzn1-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
Which is OpenJDK 64-Bit Server VM.
Where does it locate? You can find it out by:
$ which java
/user/bin/java
How to override this default built-in JDK? You can do it by alternatives:
alternatives --install <link> <name> <path> <priority>
# /usr/sbin/alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_34/bin/java 100
# /usr/sbin/alternatives --install /usr/bin/jar jar /usr/java/jdk1.6.0_34/bin/jar 100
# /usr/sbin/alternatives --install /usr/bin/javac javac /usr/java/jdk1.6.0_34/bin/javac 100
# /usr/sbin/alternatives --config java
Step 5). Just make sure everything is correct
# java -version
java version "1.6.0_34"
Java(TM) SE Runtime Environment (build 1.6.0_34-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.9-b04, mixed mode)
