报错信息

[root@VM-12-9-centos nacos]# sh bin/startup.sh 
which: no javac in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/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! !!

java版本信息和jdk路径

[root@VM-12-9-centos nacos]# which java
/usr/bin/java
[root@VM-12-9-centos nacos]# ls -lrt /usr/bin/java
lrwxrwxrwx 1 root root 22 Aug 22 09:47 /usr/bin/java -> /etc/alternatives/java
[root@VM-12-9-centos nacos]# ls -lrt /etc/alternatives/java
lrwxrwxrwx 1 root root 73 Aug 22 09:47 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.el7_9.x86_64/jre/bin/java
[root@VM-12-9-centos nacos]#  java -version
openjdk version "1.8.0_342"
OpenJDK Runtime Environment (build 1.8.0_342-b07)
OpenJDK 64-Bit Server VM (build 25.342-b07, mixed mode)
[root@VM-12-9-centos nacos]#