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Installing and Configuring the Java SDK




Grab the sdk from java.com. For us, we are going to install this on Lobstora, which is a GNU/Linux box. Just make the binary executable and run it: 

[root@srv-1 opt]# chmod 700 j2*.bin
[root@srv-1 opt]# ./j2sdk-1_4_2_03-linux-i586.bin

We like putting this in /opt with a symlink to j2sdk. 

[root@srv-1 opt]# ln -s j2sdk1.4.2_03 j2sdk
[root@srv-1 opt]# ls -l
total 20
lrwxrwxrwx    1 root     root           13 Jan 24 11:03 j2sdk -> j2sdk1.4.2_03
drwxr-xr-x    9 root     root         4096 Jan 24 09:32 j2sdk1.4.2_03
drwx------    2 root     root        16384 Jan 19 13:29 lost+found
[root@srv-1 opt]#

Let's set up the environment variables and the path in /etc/profile: 

JAVA_HOME="/opt/j2sdk"
PATH="$PATH:/opt/j2sdk/bin"
export PATH JAVA_HOME USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC
[root@srv-1 opt]# source /etc/profile
[root@srv-1 opt]# set
.
.
.
JAVA_HOME=/opt/j2sdk
.
.
.
PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:
/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin:/opt/j2sdk/bin
.
.
.
[root@srv-1 opt]# java -version
java version "1.4.2_03"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)
[root@srv-1 opt]#

Looking good.



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