我使用这个网站在我的ubuntu 14.04机器上手动安装了tomcat7：http://www.krizna.com/ubuntu/install-tomcat-7-ubuntu-14-04/#manual（手动方式）。
安装正确但是在尝试使用http://server-ip:8080打开默认页面时，它没有打开并给我：此网页不可用
我的日志文件没有错误：
Jan 14, 2015 11:35:25 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Jan 14, 2015 11:35:25 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
Jan 14, 2015 11:35:26 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
Jan 14, 2015 11:35:26 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-8080"]
Jan 14, 2015 11:35:26 PM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["ajp-bio-8009"]
Jan 14, 2015 11:35:26 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["http-bio-8080"]
Jan 14, 2015 11:35:26 PM org.apache.coyote.AbstractProtocol destroy
INFO: Destroying ProtocolHandler ["ajp-bio-8009"]
Jan 14, 2015 11:42:31 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages$
Jan 14, 2015 11:42:32 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Jan 14, 2015 11:42:32 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 713 ms
Jan 14, 2015 11:42:32 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Jan 14, 2015 11:42:32 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.54
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.54/webapps/docs
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/docs has finished in 533 ms
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.54/webapps/host-manager
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/host-manager has finished in 104 ms
Jan 14, 2015 11:42:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.54/webapps/manager
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/manager has finished in 59 ms
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/manager has finished in 59 ms
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.54/webapps/ROOT
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/ROOT has finished in 56 ms
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.54/webapps/examples
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deployment of web application directory /usr/local/apache-tomcat-7.0.54/webapps/examples has finished in 424 ms
Jan 14, 2015 11:42:33 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Jan 14, 2015 11:42:33 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Jan 14, 2015 11:42:33 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1262 ms