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1.4 预备工作
本书包含大量Redis命令操作实例和Python代码应用示例，执行和测试这些示例需要用到Redis服务器及其附带的redis-cli客户端、Python编程环境和redis-py客户端，如果你尚未安装这些软件，那么请查阅附录A和附录B并按照指引进行安装。
在正确安装Redis服务器之后，可以通过执行以下命令启动Redis服务器：
$ redis-server
28393:C 02 Jul 2019 23:49:25.952 # oO0OoO0OoO0Oo Redis is starting
oO0OoO0OoO0Oo
28393:C 02 Jul 2019 23:49:25.952 # Redis version=999.999.999, bits=64,
commit=0cabe0cf, modified=1, pid=28393, just started
28393:C 02 Jul 2019 23:49:25.952 # Warning: no config file specified, using
the default config. In order to specify a config file use /Users/huangz/code/
redis/src/redis-server /path/to/redis.conf
28393:M 02 Jul 2019 23:49:25.953 ＊ Increased maximum number of open files to
10032 (it was originally set to 256).
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 999.999.999 (0cabe0cf/1) 64 bit
.-`` .-```. ```\/ _., _ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 28393
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
28393:M 02 Jul 2019 23:49:25.954 # Server initialized
28393:M 02 Jul 2019 23:49:25.954 ＊ Ready to accept connection
并通过以下命令启动redis-cli客户端：
$ redis-cli
127.0.0.1:6379>
以及通过以下命令启动Python解释器并载入redis-py库：
$ python3
Python 3.7.3 (default, Mar 272019, 09:23:15)
[Clang 10.0.1 (clang-1001.0.46.3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from redis import Redis
>>>
上述准备工作圆满完成之后，我们就可以开始学习Redis命令的基本知识了。