# Step 1: Modify the Tomcat startup script

The Tomcat startup script must be modified to include the **CATALINA\_OPTS** variable.

**CATALINA\_OPTS** indicates the amount of memory to allocate. It also indicates where Pentaho licenses are installed.

Perform the following steps to include the **CATALINA\_OPTS** variable:

1. Make sure the Tomcat web application server is not running. Open a Terminal window and type `ps -A` at the prompt.
2. If the server is running, stop it.
3. Use a text editor to open the startup `.sh` file, which is in the `pentaho/server/pentaho-server/tomcat/bin` directory.
4. Locate the **#Check that target executable exists** line and add this code above it.

   `DI_HOME=<your pentaho directory>/pentaho-solutions/system/kettle`
5. Add the Java option **pentaho.installed.licenses.file to CATALINA\_OPTS**.

   You need to modify the setting of the **CATALINA\_OPTS** variable at the end of the file by adding the Java option. See the following example.

   ```java
   EXPORT CATALINA_OPTS="-Xms4096m -Xmx6144m -XX:MaxPermSize=256m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000 
   -Dpentaho.installed.licenses.file=$PENTAHO_INSTALLED_LICENSE_PATH -DDI_HOME=$DI_HOME"

   ```
6. Save and close the file.