Detailed explanation of how to install and configure Redis (Linux environment)

How to installRedis? The following article will introduce to you how to install and configure Redis in a Linux environment.

[Related recommendations: Redis video tutorial]

1. Prepare the gcc environment

yum install gcc-c++

The following log appears, which means the installation is successful. Package gcc-c -4.8.5-39.el7.x86_64 already installed and latest version

Loaded plugins: fastestmirror
Determining fastest mirrors
base                                                                     | 3.6 kB  00:00:00     
docker-ce-stable                                                         | 3.5 kB  00:00:00     
epel                                                                     | 4.7 kB  00:00:00     
extras                                                                   | 2.9 kB  00:00:00     
nginx                                                                    | 2.9 kB  00:00:00     
updates                                                                  | 2.9 kB  00:00:00     
(1/7): epel/x86_64/group_gz                                              |  95 kB  00:00:00     
(2/7): epel/x86_64/updateinfo                                            | 1.0 MB  00:00:00     
(3/7): docker-ce-stable/x86_64/primary_db                                |  45 kB  00:00:00     
(4/7): extras/7/x86_64/primary_db                                        | 205 kB  00:00:00     
(5/7): updates/7/x86_64/primary_db                                       | 3.0 MB  00:00:00     
(6/7): epel/x86_64/primary_db                                            | 6.8 MB  00:00:00     
(7/7): nginx/x86_64/primary_db                                           |  55 kB  00:00:02     
Package gcc-c++-4.8.5-39.el7.x86_64 already installed and latest version
Nothing to do
[root@root ~]#

2. Download and install Redis

Execute command: wget http://download.redis.io/releases/redis-5.0.7.tar.gz. Unzip it after the download is complete. Then execute the make and make install commands successively.

[root@root /]# cd usr/java
[root@root java]# mkdir redis
[root@root java]# cd redis/
[root@root redis]# wget http://download.redis.io/releases/redis-5.0.7.tar.gz
[root@root redis]# tar -zxvf redis-5.0.7.tar.gz
[root@root redis]# cd redis-5.0.7
[root@root redis-5.0.7]# make
[root@root redis-5.0.7]# make install

3. Start

Enter the command: redis-server redis.conf , start Redis. Seeing the following page means the startup is successful.

[root@root redis-5.0.7]# redis-server redis.conf
                _._                                                  
           _.-``__ ''-._                                             
      _.-``    `.  `_.  ''-._           Redis 5.0.7 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._                                   
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 12513
  `-._    `-._  `-./  _.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |           http://redis.io        
  `-._    `-._`-.__.-'_.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |                                  
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                       
          `-._        _.-'                                           
              `-.__.-'

But this kind of startup cannot do any operations under this tab page, because after using Ctrl c at this time, it becomes like this. That is to say, Redis is closed. This method is started in the foreground.

^C13082:signal-handler (1594381754) Received SIGINT scheduling shutdown...
13082:M 10 Jul 2020 19:49:14.132 # User requested shutdown...
13082:M 10 Jul 2020 19:49:14.132 * Saving the final RDB snapshot before exiting.
13082:M 10 Jul 2020 19:49:14.135 * DB saved on disk
13082:M 10 Jul 2020 19:49:14.135 * Removing the pid file.
13082:M 10 Jul 2020 19:49:14.135 # Redis is now ready to exit, bye bye...

4. Background startup

Open the redis.conf file. This is also the configuration file of Redis.

[root@root redis-5.0.7]# vim redis.conf 
#打开之后，在命令窗口按下/输入daem然后回车

Change to yes

daemonize yes

Redis does not run as a daemon process by default. You can modify it through this configuration item and use yes to enable the daemon. Process, after enabling the daemon process, Redis will write the pid to a pidfile in the /var/run/redis_6379.pid file.

Start again

[root@root redis-5.0.7]# redis-server redis.conf 
13352:C 10 Jul 2020 19:54:34.301 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
13352:C 10 Jul 2020 19:54:34.301 # Redis version=5.0.7, bits=64, commit=00000000, modified=0, pid=13352, just started
13352:C 10 Jul 2020 19:54:34.301 # Configuration loaded

5. Connect to Redis

[root@root redis-5.0.7]# redis-cli 
127.0.0.1:6379> ping
PONG
127.0.0.1:6379> config get requirepass
#查看密码
1) "requirepass"
2) ""
127.0.0.1:6379>

Set password

We found that we can enter Redis without a password. So how to set it up?

requirepass foobared: Set the Redis connection password. If the connection password is configured, the client needs to pass AUTH when connecting to Redis The password command provides a password, which is turned off by default.

1. Temporary setting

config set requirepass 123456

2. Permanent setting

[root@root redis-5.0.7]# vim redis.conf
#打开之后，在命令窗口按下/输入 requirepass 然后回车

Find the content as shown in the picture, release the comment and set your own password.

Then restart Redis.

[root@root redis-5.0.7]# redis-server redis.conf 
[root@root redis-5.0.7]# redis-cli 
127.0.0.1:6379> ping
(error) NOAUTH Authentication required.
127.0.0.1:6379> auth xxx
OK
127.0.0.1:6379> ping
PONG
127.0.0.1:6379>

You can see that when I ping for the first time, I am prompted that I need to authenticate. auth xxxThis is to enter the password after connecting. You can also enter when connecting:

[root@root redis-5.0.7]# redis-cli -p 6379 -a xxx

Online experience: try.redis.io/

This article is reproduced from: https://juejin.cn /post/6979019298543140901#heading-4

Author: Programmer Xiaojie

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