Neither JAVA_HOME nor the JRE_HOME variable defined

Raakh · 05-29-2007, 06:15 AM

I have my dedicated server and am using putty

I want to set my classpath.

when I am using the command from apache-tomcat-5.5.20/bin/sh classpath.sh then message appears
"Neither JAVA_HOME nor the JRE_HOME variable defined"

PROBLEMS:
1. how do i correct this error
2. how do i set the classpath using putty

thanks & best regards

reddazz · 05-29-2007, 07:03 AM

Hi and welcome to LQ. Firstly what Linux distribution are you using. You need to set JAVA_HOME in your /etc/profile or .bash_profile. The JAVA_HOME variable should point to the directory containing your java installation. There are other methods depending on your distro.

Raakh · 05-29-2007, 11:57 AM

Quote:

Originally Posted by reddazz

Hi and welcome to LQ. Firstly what Linux distribution are you using. You need to set JAVA_HOME in your /etc/profile or .bash_profile. The JAVA_HOME variable should point to the directory containing your java installation. There are other methods depending on your distro.

I don't know as I never used linux and I have provided dedicated server with login password. I am using putty to login

shadowdancer · 05-29-2007, 01:43 PM

so...probably you have to do this every login.

export JAVA_HOME=/opt/jdk_1.6/
export JRE_HOME=/opt/jdk_1.6/jre

replace /opt/jdk_1.6/ with your JAVA directory...

reddazz · 05-29-2007, 02:19 PM

Quote:

Originally Posted by Raakh

I don't know as I never used linux and I have provided dedicated server with login password. I am using putty to login

To find out the distro, try the following

Code:

cat /etc/*-release

Post back the output.

Raakh · 06-02-2007, 02:27 AM

Quote:

Originally Posted by reddazz

To find out the distro, try the following

Code:

cat /etc/*-release

Post back the output.

output:
LSB_VERSION="core-2.0-noarch:core-3.0-noarch:core-2.0-x86_64:core-3.0-x86_64"
SUSE Linux Enterprise Server 10 (x86_64)
VERSION = 10

reddazz · 06-02-2007, 04:02 AM

From the output, the distribution that you are running is SUSE Linux Enterprise Server 10. You can set JAVA_HOME permanently by putting a little script similar to the one below in /etc/profile.d

Code:

export JAVA_HOME=/path/to/java/dir

Make sure you use the path of your own java directory. Save the file as java_home.sh in /etc/profile.d and make it executable by doing

Code:

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

Raakh · 06-02-2007, 04:49 AM

Quote:

Originally Posted by reddazz

From the output, the distribution that you are running is SUSE Linux Enterprise Server 10. You can set JAVA_HOME permanently by putting a little script similar to the one below in /etc/profile.d

Code:

export JAVA_HOME=/path/to/java/dir

Make sure you use the path of your own java directory. Save the file as java_home.sh in /etc/profile.d and make it executable by doing

Code:

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

I am really thankful to you

Plz let me know about classpath how can I see and add more in classpath

thanks again

Nylex · 06-02-2007, 06:35 AM

The classpath is an environment variable like JAVA_HOME. You can see what's in it by doing a "echo $CLASSPATH" in the shell. If there's no output, then it's not set. To set it, you use the same export statements that reddazz gave. If you just want to add a directory to your classpath, you would use an export statement, but you'd include the old classpath in it as well, e.g. "export CLASSPATH=$CLASSPATH:/foo", which says that the classpath should be set to the old value, but with /foo added. Directories are separated by colons in environment variables.

Raakh · 06-02-2007, 06:40 AM

Quote:

Originally Posted by Nylex

The classpath is an environment variable like JAVA_HOME. You can see what's in it by doing a "echo $CLASSPATH" in the shell. If there's no output, then it's not set. To set it, you use the same export statements that reddazz gave. If you just want to add a directory to your classpath, you would use an export statement, but you'd include the old classpath in it as well, e.g. "export CLASSPATH=$CLASSPATH:/foo", which says that the classpath should be set to the old value, but with /foo added. Directories are separated by colons in environment variables.

VERY VERY Thankful to you

thanks again