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b) Edit the file catalina.properties under $CATALINA_BASE/conf; there is a property called common.loader to which you can add additional paths to find JARs or classes for the common classloader.

How do I

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If Tomcat was working fine the first few times after installation but suddenly refuses to start up and gives the following error message:

$ ./startup.sh
Cannot find /path/to/tomcat/bin/setclasspath.sh
This file is needed to run this program

Then all you need to do is to include the complete paths for the BASEDIR and CATALINA_HOME variables in the files setclasspath.sh and catalina.sh respectively.

This should be done even if CATALINA_HOME has been defined and exported previously on the command line and/or in /etc/profile as well. Moreover, this error message persists even though the file setclasspath.sh is present in Tomcat's bin directory.

$ echo "BASEDIR=/path/to/tomcat" >> setclasspath.sh
$ echo "CATALINA_HOME=/path/to/tomcat" >> catalina.sh

How do I authenticate Manager access via JNDI to Active Directory for multiple Tomcat instances?

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