备注:测试版本 redis 4.0.9

生产环境中经常要设置redis的登陆密码，来保证数据的安全。

1.找到redis配置文件路径

找到配置文件指定路径，设置密码即可

2.重启redis服务

-- 关闭redis
redis-cli -h 10.31.1.124 -p 6379 shutdown
-- 启动redis
redis-server /usr/local/redis/redis.conf &
-- 用密码登陆redis
redis-cli -h 10.31.1.124 -p 6379 -a "123456"
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测试记录:

[root@10-31-1-124 redis]# redis-cli -h 10.31.1.124 -p 6379 shutdown
8877:M 30 Oct 14:57:22.374 # User requested shutdown...
8877:M 30 Oct 14:57:22.374 * Saving the final RDB snapshot before exiting.
8877:M 30 Oct 14:57:22.375 * DB saved on disk
8877:M 30 Oct 14:57:22.375 * Removing the pid file.
8877:M 30 Oct 14:57:22.375 # Redis is now ready to exit, bye bye...
[1]+  完成                  redis-server /usr/local/redis/redis.conf(工作目录：~)
(当前工作目录：/usr/local/redis)
[root@10-31-1-124 redis]# 
[root@10-31-1-124 redis]# redis-server /usr/local/redis/redis.conf &
[1] 9560
[root@10-31-1-124 redis]# 9560:C 30 Oct 14:57:35.797 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
9560:C 30 Oct 14:57:35.797 # Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=9560, just started
9560:C 30 Oct 14:57:35.797 # Configuration loaded
9560:M 30 Oct 14:57:35.798 * Increased maximum number of open files to 10032 (it was originally set to 1024).
                _._                                                  
           _.-``__ ''-._                                             
      _.-``    `.  `_.  ''-._           Redis 4.0.9 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._                                   
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 9560
  `-._    `-._  `-./  _.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |           http://redis.io        
  `-._    `-._`-.__.-'_.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |                                  
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                       
          `-._        _.-'                                           
              `-.__.-'                                               

9560:M 30 Oct 14:57:35.801 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
9560:M 30 Oct 14:57:35.801 # Server initialized
9560:M 30 Oct 14:57:35.801 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
9560:M 30 Oct 14:57:35.802 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
9560:M 30 Oct 14:57:35.802 * DB loaded from disk: 0.000 seconds
9560:M 30 Oct 14:57:35.802 * Ready to accept connections

[root@10-31-1-124 redis]# redis-cli -h 10.31.1.124 -p 6379 -a "123456"
10.31.1.124:6379> 
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