一、Redis常用基本命令
#可以使用help命令查看各redis命令用法
[root@Client-Ubuntu-1804-250:~]# redis-cli -a redis --no-auth-warning help
redis-cli 5.0.14
To get help about Redis commands type:
"help @<group>" to get a list of commands in <group>
"help <command>" for help on <command>
"help <tab>" to get a list of possible help topics
"quit" to exit
To set redis-cli preferences:
":set hints" enable online hints
":set nohints" disable online hints
Set your preferences in ~/.redisclirc
[root@Client-Ubuntu-1804-250:~]# redis-cli -a redis --no-auth-warning
#查看info命令帮助
127.0.0.1:6379> help info
INFO [section]
summary: Get information and statistics about the server
since: 1.0.0
group: server
#查看set命令帮助
127.0.0.1:6379> help set
SET key value [expiration EX seconds|PX milliseconds] [NX|XX]
summary: Set the string value of a key
since: 1.0.0
group: string
127.0.0.1:6379>
1、INFO
![【Redis】常用命令介绍-LMLPHP]( "【Redis】常用命令介绍-LMLPHP")
![【Redis】常用命令介绍-LMLPHP]( "【Redis】常用命令介绍-LMLPHP")
127.0.0.1:6379> help info
INFO [section]
summary: Get information and statistics about the server
since: 1.0.0
group: server
127.0.0.1:6379> info
# Server
redis_version:5.0.14
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:5d32a2d9ed5f67d5
redis_mode:standalone
os:Linux 4.15.0-210-generic x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:7.5.0
process_id:6069
run_id:0e67fcd27ff6ae2589ff90ac2516bd52269f2965
tcp_port:6379
uptime_in_seconds:924
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:5745912
executable:/app/redis/bin/redis-server
config_file:/app/redis/etc/redis_6379.conf
# Clients
connected_clients:1
client_recent_max_input_buffer:2
client_recent_max_output_buffer:0
blocked_clients:0
# Memory
used_memory:943496
used_memory_human:921.38K
used_memory_rss:7237632
used_memory_rss_human:6.90M
used_memory_peak:943496
used_memory_peak_human:921.38K
used_memory_peak_perc:100.11%
used_memory_overhead:898934
used_memory_startup:791488
used_memory_dataset:44562
used_memory_dataset_perc:29.32%
allocator_allocated:1129952
allocator_active:1409024
allocator_resident:14368768
total_system_memory:1006243840
total_system_memory_human:959.63M
used_memory_lua:37888
used_memory_lua_human:37.00K
used_memory_scripts:0
used_memory_scripts_human:0B
number_of_cached_scripts:0
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
allocator_frag_ratio:1.25
allocator_frag_bytes:279072
allocator_rss_ratio:10.20
allocator_rss_bytes:12959744
rss_overhead_ratio:0.50
rss_overhead_bytes:-7131136
mem_fragmentation_ratio:8.03
mem_fragmentation_bytes:6336128
mem_not_counted_for_evict:1368
mem_replication_backlog:0
mem_clients_slaves:0
mem_clients_normal:49694
mem_aof_buffer:1368
mem_allocator:jemalloc-5.1.0
active_defrag_running:0
lazyfree_pending_objects:0
# Persistence
loading:0
rdb_changes_since_last_save:658
rdb_bgsave_in_progress:0
rdb_last_save_time:1683467492
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:233472
aof_enabled:1
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
aof_last_cow_size:0
aof_current_size:40803
aof_base_size:0
aof_pending_rewrite:0
aof_buffer_length:0
aof_rewrite_buffer_length:0
aof_pending_bio_fsync:0
aof_delayed_fsync:0
# Stats
total_connections_received:12
total_commands_processed:1019
instantaneous_ops_per_sec:0
total_net_input_bytes:41255
total_net_output_bytes:46481
instantaneous_input_kbps:0.00
instantaneous_output_kbps:0.00
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:0
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:0
keyspace_misses:0
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:523
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0
# Replication
role:master
connected_slaves:0
master_replid:518de7012facc8a7fe780ed4eb5f4de015f01d56
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
# CPU
used_cpu_sys:0.365552
used_cpu_user:0.570244
used_cpu_sys_children:0.000000
used_cpu_user_children:0.001215
# Cluster
cluster_enabled:0
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
#查看当前节点CPU信息
127.0.0.1:6379> info CPU
# CPU
used_cpu_sys:0.508881
used_cpu_user:0.848135
used_cpu_sys_children:0.000000
used_cpu_user_children:0.003046
#查看当前节点Server信息
127.0.0.1:6379> info Server
# Server
redis_version:5.0.14
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:5d32a2d9ed5f67d5
redis_mode:standalone
os:Linux 4.15.0-210-generic x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:7.5.0
process_id:6069
run_id:0e67fcd27ff6ae2589ff90ac2516bd52269f2965
tcp_port:6379
uptime_in_seconds:1358
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:5746346
executable:/app/redis/bin/redis-server
config_file:/app/redis/etc/redis_6379.conf
2、SELECT
![【Redis】常用命令介绍-LMLPHP]( "【Redis】常用命令介绍-LMLPHP")
![【Redis】常用命令介绍-LMLPHP]( "【Redis】常用命令介绍-LMLPHP")
127.0.0.1:6379> help select
SELECT index
summary: Change the selected database for the current connection
since: 1.0.0
group: connection
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> select 2
OK
127.0.0.1:6379[2]> select 3
OK
127.0.0.1:6379[3]>
3、KEYS
127.0.0.1:6379> help keys
KEYS pattern
summary: Find all keys matching the given pattern
since: 1.0.0
group: generic
#？ 占位符
127.0.0.1:6379> keys key_?
1) "key_8"
2) "key_5"
3) "key_4"
4) "key_9"
5) "key_0"
6) "key_2"
7) "key_1"
8) "key_3"
9) "key_6"
10) "key_7"
127.0.0.1:6379> keys key_2?
1) "key_27"
2) "key_28"
3) "key_22"
4) "key_26"
5) "key_21"
6) "key_20"
7) "key_25"
8) "key_23"
9) "key_24"
10) "key_29"
#* 通配
#127.0.0.1:6379> keys key_9*
1) "key_995"
2) "key_957"
3) "key_988"
4) "key_98"
5) "key_990"
6) "key_959"
7) "key_949"
8) "key_984"
9) "key_999"
10) "key_950"
11) "key_976"
12) "key_912"
13) "key_991"
14) "key_944"
15) "key_987"
16) "key_954"
17) "key_981"
18) "key_951"
19) "key_998"
20) "key_916"
21) "key_986"
22) "key_933"
23) "key_996"
24) "key_918"
25) "key_942"
26) "key_906"
27) "key_925"
28) "key_965"
29) "key_964"
30) "key_917"
31) "key_9"
32) "key_95"
33) "key_994"
34) "key_94"
35) "key_961"
36) "key_901"
37) "key_962"
38) "key_909"
39) "key_971"
40) "key_966"
41) "key_968"
42) "key_913"
43) "key_960"
44) "key_937"
45) "key_977"
46) "key_90"
47) "key_926"
48) "key_93"
49) "key_955"
50) "key_970"
51) "key_939"
52) "key_908"
53) "key_929"
54) "key_972"
55) "key_902"
56) "key_948"
57) "key_956"
58) "key_930"
59) "key_978"
60) "key_99"
61) "key_924"
62) "key_915"
63) "key_943"
64) "key_932"
65) "key_928"
66) "key_914"
67) "key_982"
68) "key_905"
69) "key_974"
70) "key_979"
71) "key_940"
72) "key_941"
73) "key_958"
74) "key_997"
75) "key_993"
76) "key_922"
77) "key_92"
78) "key_980"
79) "key_934"
80) "key_911"
81) "key_946"
82) "key_923"
83) "key_945"
84) "key_992"
85) "key_969"
86) "key_921"
87) "key_910"
88) "key_936"
89) "key_983"
90) "key_903"
91) "key_989"
92) "key_931"
93) "key_919"
94) "key_953"
95) "key_947"
96) "key_96"
97) "key_935"
98) "key_91"
99) "key_907"
100) "key_952"
101) "key_927"
102) "key_967"
103) "key_904"
104) "key_900"
105) "key_938"
106) "key_973"
107) "key_97"
108) "key_920"
109) "key_985"
110) "key_963"
111) "key_975"
#展示当前数据库内的所有key
127.0.0.1:6379> keys *
......
987) "key_172"
988) "key_64"
989) "key_79"
990) "key_801"
991) "key_502"
992) "key_144"
993) "key_514"
994) "key_615"
995) "key_197"
996) "key_84"
997) "key_681"
998) "key_572"
999) "key_656"
1000) "key_805"
4、BGSAVE
127.0.0.1:6379>
127.0.0.1:6379> help bgsave
BGSAVE -
summary: Asynchronously save the dataset to disk
since: 1.0.0
group: server
127.0.0.1:6379> bgsave
Background saving started
5、DBSIZE
127.0.0.1:6379> help dbsize
DBSIZE -
summary: Return the number of keys in the selected database
since: 1.0.0
group: server
127.0.0.1:6379> dbsize
(integer) 1000
127.0.0.1:6379> select 1
OK
127.0.0.1:6379[1]> dbsize
(integer) 0
6、FLUSHDB
127.0.0.1:6379> help flushdb
FLUSHDB [ASYNC]
summary: Remove all keys from the current database
since: 1.0.0
group: server
127.0.0.1:6379[1]> info KeySpace
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
db1:keys=4,expires=0,avg_ttl=0
#清空db1中的所有键值，不会影响到db0中的数据
127.0.0.1:6379[1]> flushdb
OK
127.0.0.1:6379[1]> info KeySpace
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
127.0.0.1:6379[1]>
7、FLUSHALL
127.0.0.1:6379> info KeySpace
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
db1:keys=4,expires=0,avg_ttl=0
127.0.0.1:6379> flushall
OK
127.0.0.1:6379> info KeySpace
# Keyspace
127.0.0.1:6379>
8、SHUTDOWN
127.0.0.1:6379> help shutdown
SHUTDOWN [NOSAVE|SAVE]
summary: Synchronously save the dataset to disk and then shut down the server
since: 1.0.0
group: server
127.0.0.1:6379> shutdown
not connected>
not connected>
not connected> exit
[root@Client-Ubuntu-1804-250:~]# ps -aux | grep redis | grep ^grep
[root@Client-Ubuntu-1804-250:~]# ss -ntlp
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 127.0.0.53%lo:53 0.0.0.0:* users:(("systemd-resolve",pid=867,fd=13))
LISTEN 0 128 0.0.0.0:22 0.0.0.0:* users:(("sshd",pid=978,fd=3))
LISTEN 0 128 127.0.0.1:6010 0.0.0.0:* users:(("sshd",pid=1661,fd=10))
LISTEN 0 128 127.0.0.1:6011 0.0.0.0:* users:(("sshd",pid=1661,fd=15))
LISTEN 0 128 [::]:22 [::]:* users:(("sshd",pid=978,fd=4))
LISTEN 0 128 [::1]:6010 [::]:* users:(("sshd",pid=1661,fd=9))
LISTEN 0 128 [::1]:6011 [::]:* users:(("sshd",pid=1661,fd=12)) 禁用Redis命令（rename配置）
# Command renaming.
#
# It is possible to change the name of dangerous commands in a shared
# environment. For instance the CONFIG command may be renamed into something
# hard to guess so that it will still be available for internal-use tools
# but not available for general clients.
#
# Example:
#
# rename-command CONFIG b840fc02d524045429941cc15f59e41cb7be6c52
#
# It is also possible to completely kill a command by renaming it into
# an empty string:
#
# rename-command CONFIG ""
#
# Please note that changing the name of commands that are logged into the
# AOF file or transmitted to replicas may cause problems.
renmae-comand FLUSHALL ""
rename-comand FULSHDB "REMOVE-THIS-DATABASE"
127.0.0.1:6379> info keySpace
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
127.0.0.1:6379> flushall
(error) ERR unknown command `flushall`, with args beginning with:
127.0.0.1:6379> flushdb
(error) ERR unknown command `flushdb`, with args beginning with:
127.0.0.1:6379> info keySpace
# Keyspace
db0:keys=1000,expires=0,avg_ttl=0
127.0.0.1:6379>
127.0.0.1:6379> REMOVE-THIS-DATABASE
OK
127.0.0.1:6379> info keySpace
# Keyspace
127.0.0.1:6379>