JAVA installation

Solaris 10 update 2 comes with jdk-1_5_0_06, update 3 comes with jdk-1_5_0_07, and both of them are working for all our applications all right.

RHEL4 came with 'jre-1.5.0-ibm' installed in /etc/alternatives, several symbolic links exist from /usr/bin. That JAVA gives errors compiling our programs, so we decided to install Sun version 1.5.0_06 (the same we have on Solaris machines). Maybe RHEL4 version is fine, just too peaky. Anyway following was done:

• 'jdk-1_5_0_06-*' files (for all supported platforms just in case) were downloaded from Sun web site to /usr/local/downloads

• file 'jdk-1_5_0_06-linux-i586.bin' was copied to /apps, and following commands executed:

chmod 775 jdk-1_5_0_06-linux-i586.bin
./jdk-1_5_0_06-linux-i586.bin
rm jdk-1_5_0_06-linux-i586.bin

• the number of symbolic links were hiden:

mv /usr/bin/jar /usr/bin/jar.hide
mv /usr/bin/java /usr/bin/java.hide
mv /usr/bin/javac /usr/bin/javac.hide
mv /usr/bin/javadoc /usr/bin/javadoc.hide
mv /usr/bin/javah /usr/bin/javah.hide

• and new links were created:

cd /usr/bin
ln -s /apps/jdk1.5.0_06/bin/jar jar
ln -s /apps/jdk1.5.0_06/bin/java java
ln -s /apps/jdk1.5.0_06/bin/javac javac
ln -s /apps/jdk1.5.0_06/bin/javadoc javadoc
ln -s /apps/jdk1.5.0_06/bin/javah javah

• symbolic link operation have to be repeated on all RHEL4 machines