Merge pull request Snailclimb#15 from hbignlin/patch-1

Update d-2-redis.md

Author: Snailclimb

docs/d-2-redis.md

@@ -225,7 +225,7 @@ OK
 下面我们简单看看它的使用！
 
 ```bash
-127.0.0.1:6379> hset userInfoKey name "guide" description "dev" age "24"
+127.0.0.1:6379> hmset userInfoKey name "guide" description "dev" age "24"
 OK
 127.0.0.1:6379> hexists userInfoKey name # 查看 key 对应的 value中指定的字段是否存在。
 (integer) 1
@@ -677,4 +677,4 @@ Cache Aside Pattern 中遇到写请求是这样的：更新 DB，然后直接删
 * 《Redis 设计与实现》
 * Redis 命令总结：http://Redisdoc.com/string/set.html
 * 通俗易懂的 Redis 数据结构基础教程：[https://juejin.im/post/5b53ee7e5188251aaa2d2e16](https://juejin.im/post/5b53ee7e5188251aaa2d2e16)
-* WHY Redis choose single thread (vs multi threads): [https://medium.com/@jychen7/sharing-redis-single-thread-vs-multi-threads-5870bd44d153](https://medium.com/@jychen7/sharing-redis-single-thread-vs-multi-threads-5870bd44d153)
+* WHY Redis choose single thread (vs multi threads): [https://medium.com/@jychen7/sharing-redis-single-thread-vs-multi-threads-5870bd44d153](https://medium.com/@jychen7/sharing-redis-single-thread-vs-multi-threads-5870bd44d153)