java -cp /usr/share/tomcat6/lib/catalina.jar org.apache.catalina.util.ServerInfo
Server version: Apache Tomcat/6.0.35
Server built: Feb 17 2017 02:24:45
Server number: 6.0.35.0
OS Name: Linux
OS Version: 3.13.0-117-generic
Architecture: amd64
JVM Version: 1.6.0_41-b41
JVM Vendor: Sun Microsystems Inc.