To define the CLASSPATH environment variable for Linux

Issue an export command for CLASSPATH and specify the directories where you have stored the Java runtime libraries (from the PATH statement), the Java help files, and the OSA/SF GUI code that you transferred. For example, you might issue the following command with these definitions:
```
export CLASSPATH=/usr/osajavagui/ioajava.jar:/usr/java/jh1.1.3/javahelp/lib/jh.jar
```
To verify if the variable is set correctly, issue the following command:
```
echo $CLASSPATH
```
You can update the .bash_profile so that you do not need to retype the export CLASSPATH command each type that you log on. You update the file depending on how you log on:
- If you log on as root, update the file in /root:
```
/root/.bash_profile
```
- If you log on as a user, update the file in the /home/userid directory, where userid is the id of the user. Edit the file and add the export command to the bottom of the file. You might need to create the /home/userid directory and the .bash_profile file if they do not exist. Update the attributes to make the file executable:
```
chmod +x.bash_profile
```