redis 常用命令总结

keys

返回满足给定条件的所有key

127.0.0.1:6379> keys *
1) "testlist2"
2) "testset4"
3) "testset2"
4) "mytest"
5) "num2"
6) "testset1"
7) "testset3"
8) "testset"
127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"
4) "testset3"
5) "testset"

exists

确认一个key 是否存在

127.0.0.1:6379> exists test
(integer) 0
127.0.0.1:6379> exists testset
(integer) 1

dbsize

返回当前数据库中key 的数目。
	
127.0.0.1:6379> dbsize
(integer) 10
127.0.0.1:6379> keys *
1) "testlist2"
2) "testset4"
3) "testset2"
4) "mytest"
5) "name_new"
6) "num2"
7) "testset1"
8) "num3"
9) "age1"
10) "num1"

del

删除一个key

127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"
4) "testset3"
5) "testset"
127.0.0.1:6379> del testset
(integer) 1
127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"
4) "testset3"

flushdb

删除当前选择数据库中的所有key。
	
127.0.0.1:6379[1]> keys *
1) "age"
127.0.0.1:6379[1]> flushdb
OK
127.0.0.1:6379[1]> keys *
(empty list or set)
127.0.0.1:6379[1]> select 0
OK
127.0.0.1:6379> dbsize
(integer) 10

flushall

删除所有数据库中的所有key。
	
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> set age 15
OK
127.0.0.1:6379[1]> keys *
1) "age"
127.0.0.1:6379[1]> flushall
OK
127.0.0.1:6379[1]> dbsize
(integer) 0
127.0.0.1:6379[1]> select 0
OK
127.0.0.1:6379> dbsize
(integer) 0

expire

设置一个key 的过期时间(单位:秒)，ttl命令检测有效时长
	
127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"
4) "testset3"
127.0.0.1:6379> expire testset3 10
(integer) 1
127.0.0.1:6379> ttl testset3
(integer) 1
127.0.0.1:6379> ttl testset3
(integer) -2
127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"

persist

移除给定key 的过期时间，取消过期
	
127.0.0.1:6379> expire age 100
(integer) 1
127.0.0.1:6379> ttl age
(integer) 94
127.0.0.1:6379> ttl age
(integer) 90
127.0.0.1:6379> persist age
(integer) 1
127.0.0.1:6379> ttl age
(integer) -1
127.0.0.1:6379> get age
"15"

select

选择数据库（redis默认16个数据库 0~15）
	
# vim redis.conf

# Set the number of databases. The default database is DB 0, you can select
# a different one on a per-connection basis using SELECT <dbid> where
# dbid is a number between 0 and 'databases'-1
databases 16
	
127.0.0.1:6379> select 0
OK

move

将当前数据库中的key 转移到其它数据库中

127.0.0.1:6379> select 0
OK
127.0.0.1:6379> set age 15
OK
127.0.0.1:6379> get age
"15"
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> get age
(nil)
127.0.0.1:6379[1]> select 0
OK
127.0.0.1:6379> move age 1
(integer) 1
127.0.0.1:6379> select 1 
OK
127.0.0.1:6379[1]> get age
"15"
127.0.0.1:6379[1]> select 0
OK
127.0.0.1:6379> get age
(nil)

randomkey

随机返回一个key
127.0.0.1:6379> keys *
1) "testlist2"
2) "testset4"
3) "testset2"
4) "mytest"
5) "num2"
6) "testset1"
7) "num3"
8) "age1"
9) "num1"
10) "name"
127.0.0.1:6379> randomkey
"num3"

rename

重命名key
	
127.0.0.1:6379> keys *
1) "testlist2"
2) "testset4"
3) "testset2"
4) "mytest"
5) "num2"
6) "testset1"
7) "num3"
8) "age1"
9) "num1"
10) "name"
127.0.0.1:6379> rename name name_new
OK
127.0.0.1:6379> keys name*
1) "name_new"

type

返回值的类型
	
127.0.0.1:6379> keys testset*
1) "testset4"
2) "testset2"
3) "testset1"
127.0.0.1:6379> type testset1
set
127.0.0.1:6379> keys name*
1) "name_new"
127.0.0.1:6379> type name
none
127.0.0.1:6379> keys num*
1) "num2"
2) "num3"
3) "num1"
127.0.0.1:6379> type num1
string

ping

测试连接是否存活
	
127.0.0.1:6379> ping
PONG

echo

在命令行输出内容
	
127.0.0.1:6379> echo "Hello world!"
"Hello world!"

info

获取服务器的信息
	
127.0.0.1:6379> info

monitor

实时转储收到的请求
	
127.0.0.1:6379> monitor
OK
1543934476.796187 [0 127.0.0.1:52841] "info"
1543934614.406197 [0 127.0.0.1:52841] "config" "get"
1543934632.306195 [0 127.0.0.1:52841] "config" "get" "dir"
1543934662.761337 [0 127.0.0.1:52841] "config" "get" "*"

config get

获取服务器配置信息。
	
129.127.0.0.1:6379> config get *

quit / shutdown

退出连接。