redis 自动启动

要使Redis在系统启动时自动启动，你可以按照以下步骤进行操作：

1. 打开终端并登录到Redis服务器。

2. 使用以下命令编辑Redis配置文件(redis.conf)：

   sudo vi /etc/redis/redis.conf

3. 在配置文件中找到以下行：

   # If you run Redis from upstart or systemd, Redis can interact with your
   # supervision tree. Options:
   #   supervised no      - no supervision interaction
   #   supervised upstart - signal upstart by putting Redis into SIGSTOP mode
   #   supervised systemd - signal systemd by writing READY=1 to $NOTIFY_SOCKET
   #   supervised auto    - detect upstart or systemd method based on
   #                        UPSTART_JOB or NOTIFY_SOCKET environment variables
   # Note: these supervision methods only signal the process, and do not
   # auto-restart Redis after crashes.

4. 将`supervised no`行修改为`supervised systemd`：

   supervised systemd

5. 保存并关闭文件。

6. 重新启动Redis服务：

   sudo systemctl restart redis

现在，Redis将在系统启动时自动启动。您可以使用以下命令来验证Redis是否正在运行：

sudo systemctl status redis

确保状态为"active (running)"表示Redis已成功启动，并在系统重启后自动启动。