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。
ERROR: [3] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max number of threads [3796] for user [es] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
查看：ulimit -a
[1][2]
ulimit -n
ulimit -u
vi /etc/security/limits.conf:
* soft nofile 65535
* hard nofile 65535
* soft nproc 4096
* hard nproc 4096
然后打开新的会话：
ulimit -n : 65535
ulimit -u : 4096
[3]
vi /etc/sysctl.conf:
vm.max_map_count=262144
sysctl -p
