我的流程：1、阿里云Linux，重装系统盘CentOS7.6 x64，清空磁盘内容。2、用Xftp传输apache-tomcat-7.0.82和jdk-7u80-linux-x64.tar.gz并用指令解压。3、向etc/profile内export JAVA环境变量并用sorce刷新文件。4、用vim指令更改Tomcat/conf/server.xml中的8080接口为80。5、转到/bin目录下启动startup.sh，可ping通但外网无法访问，随后启动shutdown.sh。
第5步的控制台内容如下：
[root@iZj6c1q38vbvbchvmhrp3gZ bin]# ./startup.sh
Using CATALINA_BASE: /usr/web/apache-tomcat-7.0.82
Using CATALINA_HOME: /usr/web/apache-tomcat-7.0.82
Using CATALINA_TMPDIR: /usr/web/apache-tomcat-7.0.82/temp
Using JRE_HOME: /usr/web/jdk1.7.0_80/jre
Using CLASSPATH: /usr/web/apache-tomcat-7.0.82/bin/bootstrap.jar:/usr/web/apache-tomcat-7.0.82/bin/tomcat-juli.jar
Tomcat started.
[root@iZj6c1q38vbvbchvmhrp3gZ bin]# ./shutdown.sh
Using CATALINA_BASE: /usr/web/apache-tomcat-7.0.82
Using CATALINA_HOME: /usr/web/apache-tomcat-7.0.82
Using CATALINA_TMPDIR: /usr/web/apache-tomcat-7.0.82/temp
Using JRE_HOME: /usr/web/jdk1.7.0_80/jre
Using CLASSPATH: /usr/web/apache-tomcat-7.0.82/bin/bootstrap.jar:/usr/web/apache-tomcat-7.0.82/bin/tomcat-juli.jar
Oct 07, 2017 3:12:04 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Could not contact localhost:8005. Tomcat may not be running.
Oct 07, 2017 3:12:05 PM org.apache.catalina.startup.Catalina stopServer
SEVERE: Catalina.stop:
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.(Socket.java:425)
at java.net.Socket.(Socket.java:208)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:499)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:343)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:430)
[root@iZj6c1q38vbvbchvmhrp3gZ bin]#
不尽感激！！！！
tomcat start启动后，你是80端口外网是不能访问的，需要备案，你可以改成8888端口试试。
备案通过就不会出现这种问题了
阿里云的问题没必要在这里提问，直接联系阿里云的客服帮你解决，他们有内部的排错流程和工具。
尝试下改个端口号试试哦
尝试下改个端口号试试哦