机器：centos7.2

javahome：

export JAVA_HOME=/root/jdk1.8.0_60

export PATH=$JAVA_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

[root@i-j73a8nn6 ~]# java -version

java version “1.8.0_60”

Java(TM) SE Runtime Environment (build 1.8.0_60-b27)

Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

[root@i-j73a8nn6 ~]# $PATH

-bash: /root/jdk1.8.0_60/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin: No such file or directory

如果不是sudo启动时报错：

[root@i-j73a8nn6 ~]# elasticsearch-2.2.1/bin/elasticsearch

Exception in thread “main” java.lang.RuntimeException: don’t run elasticsearch as root.

at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:93)

at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:144)

at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285)

at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)

Refer to the log for complete error details.

sudo启动报错：

[root@i-j73a8nn6 ~]# sudo elasticsearch-2.2.1/bin/elasticsearch

which: no java in (/sbin:/bin:/usr/sbin:/usr/bin)

Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME

首先不能用root用户登陆，sudo默认就是root用户，sudo时需要指定其他用户名。例如：sudo -iu user_a bin/elasticsearch

新增了一个用户，让后在以新增用户启动完成。

不知道各路大神有没有在root下启动的方法？

vi /etc/sysconfig/elasticsearch

将 JAVA_HOME=/root/jdk1.8.0_60 写到文件中保存后启动

service elasticsearch start

正在启动 elasticsearch： [确定]