redis basic

• enter command: redis-cli
• choose db: select 1 (1 is db name)
• show all keys: keys *
• del key: del key_name
• show key type: type key_name
• show list type key len: llen key_name
• show list type key value: lrange key_name 0 -1

other:https://www.jianshu.com/p/52552c075bc0