世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。
异常 ：
[es@localhost bin]$ ./elasticsearch
Exception in thread "main" java.lang.RuntimeException: starting java failed with [1]
output:
[0.000s][error][logging] Error opening log file 'logs/gc.log': No such file or directory
[0.000s][error][logging] Initialization of output 'file=logs/gc.log' using options 'filecount=32,filesize=64m' failed.
error:
Invalid -Xlog option '-Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m', see error log for details.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
at org.elasticsearch.tools.launchers.JvmErgonomics.flagsFinal(JvmErgonomics.java:126)
at org.elasticsearch.tools.launchers.JvmErgonomics.finalJvmOptions(JvmErgonomics.java:88)
at org.elasticsearch.tools.launchers.JvmErgonomics.choose(JvmErgonomics.java:59)
at org.elasticsearch.tools.launchers.JvmOptionsParser.jvmOptions(JvmOptionsParser.java:137)
at org.elasticsearch.tools.launchers.JvmOptionsParser.main(JvmOptionsParser.java:95)
产生原因 : 复制后带了原es的log，
解决方式 :
1. 切换到es用户
2. 删除logs并重新mkdir
