解决Linux下启动Tomcat遇到Neither the JAVA_HOME nor the JRE_HOME environment variable is defined

解决Linux下启动Tomcat遇到Neither the JAVA_HOME nor the JRE_HOME environment variable is defined

今天在定时任务启动tomcat 时候报错

Neither the JAVA_HOME nor the JRE_HOME environment variable is defined
At least one of these environment variable is needed to run this program

找不到JAVA_HOME路径，需要做以下变更：
查看java 环境变量

[root@web09 bin]# java -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode
# 查看jak 路径
[root@web09 bin]# which java
/usr/local/chainup/jdk8/bin/java

找到启动路径所在的目录：

# 进入tomcat项目
[root@web09 shell]# cd /usr/local/chainup/tomcat/
[root@web09 tomcat-gold-stats-job]# ls
bin  conf  java_pid16407.hprof  lib  LICENSE  logs  NOTICE  RELEASE-NOTES  RUNNING.txt  stat-job.out  temp  webapps  work
[root@web09 tomcat-gold-stats-job]# cd bin/
# 修改配置文件 catalina.sh
[root@web09 bin]# vim catalina.sh
# 设置JDK 环境变量
export JAVA_HOME=/usr/local/chainup/jdk8
export JRE_HOME=/usr/local/chainup/jdk8/jre