i am trying to useing java 2EE with linux (ubuntu) like.(servlet , jsp , ...).
first : i downloaded java sdk and set the enviroment variables (PATH , CLASSPATH , JAVA_HOME ) right.
second i downloaded tomcat (Servlet Container ) ,configure it and set the enviroment variables for it
third : i ran the tamcat (sh /tomcatDir/bin/startup.sh)
fourth : i accessed html files (http://localhost/hello.html) , jsp files (http://localhost/hello.jsp) , and servlets (http://localhost/servlets/helloServlet)
What happened is : in sometimes i can access these files from server correctly sometimes i cant access that file and web browser(fireFox)..talking about certification issues and i cant see the contents of these file on my browser..what should i do ..plz?