linux下启动tomcat，“Cannot find setc

执行下面命令即可。
在 tomcat bin 文件夹下执行

$ unset CATALINA_HOME

上述操作刚开始起了作用，但是后来出现新的错误

May 22, 2019 6:18:43 AM org.apache.catalina.startup.Catalina stopServer
SEVERE: Could not contact localhost:8005. Tomcat may not be running.
May 22, 2019 6:18:43 AM org.apache.catalina.startup.Catalina stopServer
SEVERE: Catalina.stop: 
java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at java.net.Socket.<init>(Socket.java:434)
    at java.net.Socket.<init>(Socket.java:211)
    at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:498)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:343)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:430)

google 后解决方法：

I just answered this question under another question.

I solved it today,it maybe a bug with jdk-1.8.x.

For example,my jdk path is "/usr/java/jdk1.8.0_144".

cd /usr/java/jdk1.8.0_144/jre/lib/security/
find the file which named "java.security",

vi java.security
find "securerandom.source=file:/dev/random".

Modify "securerandom.source=file:/dev/./urandom ".

Then,go to the Tomcat/bin directory, execute ./start.sh and ./shutdown.sh,find that everything is all right.