> The CATALINA_BASE cant't be read / The <CATALINA_HOME>/conf/server.xml can't be read


    $ sudo chown -R USERNAME /var/lib/tomcat8
    $ sudo chown -R USERNAME /usr/share/tomcat8
    $ sudo chown -R USERNAME /etc/tomcat8
    $ sudo chown -R USERNAME /var/log/tomcat8


http://razius.com/articles/installing-and-adding-an-external-tomcat-server-in-netbeans/