JRE installation and configuration

[amithad]

Hi,

I tried installing JRE (jre-6u22-linux-i586.bin) in CentOS 5.7 i386. Did the following steps for that

1. Download the Linux Generic (jre-6u22-linux-i586.bin) binary file (Oracle site).
2. chmod +x jre-6u22-linux-i586.bin
3. ./jre-6u22-linux-i586.bin
4. to set the JAVA_HOME edited the bash_profile of the user by using the command vi ~/.bash_profile
5. exporting JAVA_HOME by typing

# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH

export JAVA_HOME=/usr/java/jre1.6.0_22/bin/java
export PATH=$PATH:/usr/java/jre1.6.0_22/bin

but when I type java -v command or java --version command it gives ' could not create java virtual machine' message

could I know hot to configure it properly

[Roxoff]

Take a look at the 'alternatives' command, read down its man page. It's designed for configuring the java system used by your computer.

[atreyu]

What about this?

java -version

note the lack of two hyphens.

[amithad]

Hi,

Thanks for the information

[arzachel]

You can try this
/usr/sbin/alternatives --config java (to show your program java default)

then
# cd/etc/profile.d/
#touch java.sh
# vi java.sh

export JAVA_HOME="/usr/java/your_java_version"
export PATH="$PATH:$JAVA_HOME/bin"

chmod +x /etc/profile.d/java.sh

Last reboot your linux

[amithad]

You can try this
/usr/sbin/alternatives --config java (to show your program java default)

then
# cd/etc/profile.d/
#touch java.sh
# vi java.sh

export JAVA_HOME="/usr/java/your_java_version"
export PATH="$PATH:$JAVA_HOME/bin"

chmod +x /etc/profile.d/java.sh

Last reboot your linux

Dear Arzachel,

That's pretty cool. I'll try that definitely

Thanks

[atreyu]

You can try this
/usr/sbin/alternatives --config java (to show your program java default)

then
# cd/etc/profile.d/
#touch java.sh
# vi java.sh

export JAVA_HOME="/usr/java/your_java_version"
export PATH="$PATH:$JAVA_HOME/bin"

chmod +x /etc/profile.d/java.sh

Last reboot your linux

Yes, this is handy, I do it too - but just a couple notes:

you should use curly braces when expanding variables when they butt up against other characters, e.g.:

export PATH="${PATH}:${JAVA_HOME}/bin"

you don't need to mark the scripts in /etc/profile.d as executable - they get sourced, not executed.