``` Could not contact localhost:8005. Tomcat may not be running 解决方法： 修改/usr/local/src/java/jdk1.8.0_202/jre/lib/security/java.security 将 "securerandom.source=file:/dev/random" 修改为"securerandom.source=file:/dev/./urandom" ``` ``` Neither the JAVA_HOME nor the JRE_HOME environment variable is defined 完美解决（tomcat error） /tomcat/bin/setclasspath.sh 添加 export JAVA_HOME=/usr/local/src/java/jdk1.8.0_202 export JRE_HOME=/usr/local/src/java/jdk1.8.0_202/jre ```