This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Check that all the scripts in your CATALINA_HOME/bin directory are executable. If they are not change the permissions to make them all executable. You can do that with the command chmod from linux command line.