nacos初次安装使用报错:Please set the JAVA_HOME variable in your environment, We need java(x64)! jdk8_nacos please set the java_home variable in your en

报错信息：

which: no javac in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/bin)
readlink: missing operand
Try 'readlink --help' for more information.
dirname: missing operand
Try 'dirname --help' for more information.
ERROR: Please set the JAVA_HOME variable in your environment, We need java(x64)! jdk8 or later is better! !!

原因分析：

1.没有配置java的环境变量

2.java环境变量的配置方法不是安装JAVA_HOME的方式

3.nacos这边是java_home下的bin目录，当时安装jdk使用的yum命令安装的，自动带上jre目录。所以修改了java_home的路径到jre即可。