1、关闭HDMI输出
/opt/vc/bin/tvservice -o
2、关闭模块
vi /etc/modules
#snd-bcm2835
3、关闭USB电流限制
因树莓派的USB接口电流大小由USB电流保护芯片进行限制，所以通过旁路USB电流保护芯片（即不让电流从电流保护芯片流过）就可以实现更大电流。
具体配置需要修改 /boot/config.txt 这个文件，在最后面添加三行。
max_usb_current=1
current_limit_override=0x5A000020
avoid_warnings=2
由于电源芯片限制，最大电流为1.2A。重新启动树莓派即可生效
4、超频，强制主频 (按官方文档：https://www.raspberrypi.org/documentation/configuration/config-txt/overclocking.md)
修改/boot/config.txt
arm_freq=1400
Frequency of the ARM CPU in MHz; default value is 1000 for the Pi Zero and Pi Zero W, 700 for Pi 1, 900 for Pi 2, 1200 for the Pi 3, 1400 for the Pi 3B+, 1500 for the Pi 4B
core_freq=500
Frequency of the GPU processor core in MHz, influences CPU performance because it drives the L2 cache and memory bus; default value is 250 for the Pi 1/Pi 2, and 400 for the Pi 3/Pi Zero/Pi Zero W; the L2 cache benefits only the Pi Zero/Pi Zero W/ Pi 1, there is a small benefit for SDRAM on the Pi 2/Pi 3, and there is no effect on the SDRAM on the Pi 4B
5、使用Dietpi版本时关闭SWAP
临时情况：swapoff -a
想要永久关闭SWAP: 需要修改/boot/dietpi.txt和/DietPi/dietpi.txt两个文件里面的SWAP设备，然后重启
6、树莓派获取硬件信息：
https://github.com/raspberrypi/documentation/blob/JamesH65-patch-vcgencmd-vcdbg-docs/raspbian/applications/vcgencmd.md