redis-cli [OPTIONS] [cmd [arg [arg ...]]]

  -h <hostname>      Server hostname (default: 127.0.0.1). ip地址
  -p <port>          Server port (default: 6379).　服務器端口號
  -s <socket>        Server socket (overrides hostname and port).
  -a <password>      Password to use when connecting to the server.　密碼
  -u <uri>           Server URI.　url格式的地址
  -r <repeat>        Execute specified command N times.
  -i <interval>      When -r is used, waits <interval> seconds per command.
                     It is possible to specify sub-second times like -i 0.1.
  -n <db>            Database number.　指定數據庫
  -x                 Read last argument from STDIN.
  -d <delimiter>     Multi-bulk delimiter in for raw formatting (default: \n).
  -c                 Enable cluster mode (follow -ASK and -MOVED redirections).
  --raw              Use raw formatting for replies (default when STDOUT is
                     not a tty).
  --no-raw           Force formatted output even when STDOUT is not a tty.
  --csv              Output in CSV format.
  --stat             Print rolling stats about server: mem, clients, ...　統計數據　連續輸出
  --latency          Enter a special mode continuously sampling latency.
                     If you use this mode in an interactive session it runs
                     forever displaying real-time stats. Otherwise if --raw or
                     --csv is specified, or if you redirect the output to a non
                     TTY, it samples the latency for 1 second (you can use
                     -i to change the interval), then produces a single output
                     and exits.　延時統計
  --latency-history  Like --latency but tracking latency changes over time.
                     Default time interval is 15 sec. Change it using -i.
  --latency-dist     Shows latency as a spectrum, requires xterm 256 colors.
                     Default time interval is 1 sec. Change it using -i.
  --lru-test <keys>  Simulate a cache workload with an 80-20 distribution.
  --replica          Simulate a replica showing commands received from the master.
  --rdb <filename>   Transfer an RDB dump from remote server to local file. 導出rdb文件
  --pipe             Transfer raw Redis protocol from stdin to server.
  管道模式
  --pipe-timeout <n> In --pipe mode, abort with error if after sending all data.
                     no reply is received within <n> seconds.
                     Default timeout: 30. Use 0 to wait forever.
                     管道超時
  --bigkeys          Sample Redis keys looking for big keys.
  --hotkeys          Sample Redis keys looking for hot keys.
                     only works when maxmemory-policy is *lfu.
  --scan             List all keys using the SCAN command.獲取服務器所有的鍵
  --pattern <pat>    Useful with --scan to specify a SCAN pattern.
  正則表達式　用于scan命令中
  --intrinsic-latency <sec> Run a test to measure intrinsic system latency.
                     The test will run for the specified amount of seconds.
  --eval <file>      Send an EVAL command using the Lua script at <file>.
  --ldb              Used with --eval enable the Redis Lua debugger.
  --ldb-sync-mode    Like --ldb but uses the synchronous Lua debugger, in
                     this mode the server is blocked and script changes are
                     not rolled back from the server memory.
  --cluster <command> [args...] [opts...]
                     Cluster Manager command and arguments (see below).
  --verbose          Verbose mode.
  --no-auth-warning  Don't show warning message when using password on command
                     line interface.
 

root@hylaz:~# redis-cli
127.0.0.1:6379> set name hylaz
OK
127.0.0.1:6379> quit
root@hylaz:~# redis-cli -h 127.0.0.1
127.0.0.1:6379> get name
"hylaz"
127.0.0.1:6379> select 6
127.0.0.1:6379[6]> 
 
root@hylaz:~# redis-cli -h 127.0.0.1 -p 6379 -n 2
127.0.0.1:6379[2]> get age
 

root@hylaz:~# redis-cli --stat
------- data ------ --------------------- load -------------------- - child -
keys       mem      clients blocked requests            connections          
11         835.52K  1       0       12 (+0)             5           
11         835.52K  1       0       13 (+1)             5         
11         835.52K  1       0       14 (+1)             5           
11         835.52K  1       0       15 (+1)             5   

root@hylaz:~# redis-cli --rdb rdb.log
SYNC sent to master, writing 344 bytes to 'rdb.log'
Transfer finished with success.

root@hylaz:~# redis-cli --bigkeys
 
# Scanning the entire keyspace to find biggest keys as well as
# average sizes per key type.  You can use -i 0.1 to sleep 0.1 sec
# per 100 SCAN commands (not usually needed).
 
[00.00%] Biggest string found so far 'name1' with 5 bytes
[00.00%] Biggest set    found so far 'myset' with 1 members
[00.00%] Biggest string found so far 'key' with 6 bytes
 
-------- summary -------
 
Sampled 13 keys in the keyspace!
Total key length in bytes is 52 (avg len 4.00)
 
Biggest string found 'key' has 6 bytes
Biggest    set found 'myset' has 1 members
 
12 strings with 33 bytes (92.31% of keys, avg size 2.75)
0 lists with 0 items (00.00% of keys, avg size 0.00)
1 sets with 1 members (07.69% of keys, avg size 1.00)
0 hashs with 0 fields (00.00% of keys, avg size 0.00)
0 zsets with 0 members (00.00% of keys, avg size 0.00)
0 streams with 0 entries (00.00% of keys, avg size 0.00)
 

# Scanning the entire keyspace to find hot keys as well as
# average sizes per key type.  You can use -i 0.1 to sleep 0.1 sec
# per 100 SCAN commands (not usually needed).
 
[00.00%] Hot key 'dd' found so far with counter 4
[00.00%] Hot key 'myset' found so far with counter 5
[00.00%] Hot key 'a' found so far with counter 5
[00.00%] Hot key 'dds' found so far with counter 4
[71.43%] Hot key 'aa' found so far with counter 4
[71.43%] Hot key 'key' found so far with counter 4
 
-------- summary -------
 
Sampled 14 keys in the keyspace!
hot key found with counter: 5	keyname: myset
hot key found with counter: 5	keyname: a
hot key found with counter: 4	keyname: dd
hot key found with counter: 4	keyname: dds
hot key found with counter: 4	keyname: aa
hot key found with counter: 4	keyname: key