-wget "http://mirrors.shuosc.org/apache/tomcat/tomcat-8/v8.5.20/bin/apache-tomcat-8.5.20.tar.gz"
-tar -zxf apache-tomcat-8.5.20.tar.gz
-mv apache-tomcat-8.5.20 apache-tomcat
+wget "http://repo1.maven.org/maven2/org/apache/tomcat/tomcat/8.5.23/tomcat-8.5.23.tar.gz"
+tar -zxf apache-tomcat-8.5.23.tar.gz
+mv apache-tomcat-8.5.23 apache-tomcat