如何查看redis-instance版本？

我在Redis网站中找到了以下命令：

$ redis服务器

这应该给我（根据站点）：

[28550] 01 Aug 19:29:28 # Warning: no config file specified, using the default config. In order to specify a config file use 'redis-server /path/to/redis.conf'
[28550] 01 Aug 19:29:28 * Server started, Redis version 2.2.12
[28550] 01 Aug 19:29:28 * The server is now ready to accept connections on port 6379
... and so forth ...

但是我得到了这个：

[8719] 04 Feb 14:51:09.009 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
[8719] 04 Feb 14:51:09.009 # Unable to set the max number of files limit to 10032 (Operation not permitted), setting the max clients configuration to 3984.
[8719] 04 Feb 14:51:09.009 # Creating Server TCP listening socket *:6379: bind: Address already in use

这意味着我需要配置它，但我只需要版本即可！

那么如何检查Redis实例版本？