1. redis-cli命令使用—先連接上服務(wù)器

1. 連接到 Redis 服務(wù)器： 使用 redis-cli 命令即可連接到本地運(yùn)行的 Redis 服務(wù)器，默認(rèn)連接到本地的 6379 端口。

redis-cli

如果 Redis 服務(wù)器不在本地或者端口不同，可以使用 -h 和 -p 參數(shù)指定主機(jī)和端口：

redis-cli -h <hostname> -p <port>

1. 執(zhí)行 Redis 命令： 連接成功后，可以直接在命令行中輸入各種 Redis 命令來(lái)執(zhí)行對(duì)應(yīng)的操作，比如設(shè)置鍵值對(duì)、獲取值、操作列表、集合等等。
2. 交互式模式： 在命令行中輸入 redis-cli 后，進(jìn)入交互式模式，可以一次次地輸入命令并查看結(jié)果，非常方便進(jìn)行實(shí)時(shí)的交互操作。
3. 執(zhí)行腳本文件： 可以通過(guò) --eval 參數(shù)執(zhí)行 Lua 腳本文件，例如：

redis-cli --eval script.lua

1. 其他參數(shù)： redis-cli 支持許多其他參數(shù)，可以使用 redis-cli --help 查看幫助文檔，了解更多用法和選項(xiàng)

2. redis-cli連接到服務(wù)器后，可以使用help查看命令

根據(jù)輸出可以看到

help 命令有三種用法

1. “help @” to get a list of commands in ,
2. ”help ” for help on ,
3. ”help ” to get a list of possible help topics

2.1. help

help 之后按 tab 按鍵可提示參數(shù)。在命令行下 tab 按鍵相信是用的最多的一個(gè)按鍵。

help 空格之后一直按 tab, 可按順序查看到所有可能的組和命令。也可輸入需要查詢(xún)的 @組或命令的前綴再按 tab 補(bǔ)全。

如：

help @generic 查看通用組的命令包括 del，dump… 等等通用命令。 help @string 查看字符串組命令。還可以查看其他組的命令如

help @list， help @set, help @sorted_set,help @hash 等等，查看所有的分組可以通過(guò) help 提示(即help+空格后，按tab鍵)

2.2. help @ 查看具體命令組的幫助

APPEND key value
summary: Appends a string to the value of a key. Creates the key if it doesn't exist.
since: 2.0.0DECR key
summary: Decrements the integer value of a key by one. Uses 0 as initial value if the key doesn't exist.
since: 1.0.0DECRBY key decrement
summary: Decrements a number from the integer value of a key. Uses 0 as initial value if the key doesn't exist.
since: 1.0.0GET key
summary: Returns the string value of a key.
since: 1.0.0GETDEL key
summary: Returns the string value of a key after deleting the key.
since: 6.2.0GETEX key [EX seconds|PX milliseconds|EXAT unix-time-seconds|PXAT unix-time-milliseconds|PERSIST]
summary: Returns the string value of a key after setting its expiration time.
since: 6.2.0GETRANGE key start end
summary: Returns a substring of the string stored at a key.
since: 2.4.0GETSET key value
summary: Returns the previous string value of a key after setting it to a new value.
since: 1.0.0INCR key
summary: Increments the integer value of a key by one. Uses 0 as initial value if the key doesn't exist.
since: 1.0.0INCRBY key increment
summary: Increments the integer value of a key by a number. Uses 0 as initial value if the key doesn't exist.
since: 1.0.0INCRBYFLOAT key increment
summary: Increment the floating point value of a key by a number. Uses 0 as initial value if the key doesn't exist.
since: 2.6.0LCS key1 key2 [LEN] [IDX] [MINMATCHLEN min-match-len] [WITHMATCHLEN]
summary: Finds the longest common substring.
since: 7.0.0MGET key [key ...]
summary: Atomically returns the string values of one or more keys.
since: 1.0.0MSET key value [key value ...]
summary: Atomically creates or modifies the string values of one or more keys.
since: 1.0.1MSETNX key value [key value ...]
summary: Atomically modifies the string values of one or more keys only when all keys don't exist.
since: 1.0.1PSETEX key milliseconds value
summary: Sets both string value and expiration time in milliseconds of a key. The key is created if it doesn't exist.
since: 2.6.0SET key value [NX|XX] [GET] [EX seconds|PX milliseconds|EXAT unix-time-seconds|PXAT unix-time-milliseconds|KEEPTTL]
summary: Sets the string value of a key, ignoring its type. The key is created if it doesn't exist.
since: 1.0.0SETEX key seconds value
summary: Sets the string value and expiration time of a key. Creates the key if it doesn't exist.
since: 2.0.0SETNX key value
summary: Set the string value of a key only when the key doesn't exist.
since: 1.0.0SETRANGE key offset value
summary: Overwrites a part of a string value with another by an offset. Creates the key if it doesn't exist.
since: 2.2.0STRLEN key
summary: Returns the length of a string value.
since: 2.2.0SUBSTR key start end
summary: Returns a substring from a string value.
since: 1.0.0

2.3. help 查看具體命令的用法

help 具體命令可以查看命令的用法描述，命令從那個(gè)版本開(kāi)始，命令屬于哪個(gè)組等信息。如 help APPEND，