启动elasticsearch时报错 “Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME”
原因：elasticsearch安装的根目录权限不是当前用户所拥有的权限。
解决办法：我的安装位置为 /usr/local/elasticsearch-5.0.0
bd_gj@all2: cd /usr/local
bd_gj@all2: ls -l
drwxr-xr-x 7 root root 4096 Nov 3 15:35 elasticsearch-5.0.0 （此时elasticsearch的安装根目录权限为root：root）
bd_gj@all2: /usr/local$ sudo chown -R bd_gj:bd_gj elasticsearch-5.0.0/
bd_gj@all2: ls -l
drwxr-xr-x 7 bd_gj bd_gj4096 Nov 3 15:35 elasticsearch-5.0.0
然后再启动就没问题了