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Briefly introduce the led driver, input device driver, i2c driver and spi driver in platform driver 1.Platform led driver The simplest example of understanding the platform can be understood as three parts, which are composed of driver layer, system core layer and device driver: Driver layer: hardware device registration part. System core la ...

1, Judgment: if 1. Single branch mode if Condition test then Command sequence fi if Condition test ; then Command sequence fi Case: [root@localhost jiaofan]# cat b.sh #!/bin/bash if [ -z $1 ] then echo "Error: service name not entered" echo "Usage: script name server name" fi if systemctl is-active $1 &> /dev/null ; then ec ...

1, Bash script set command 1. Introduction Set command is an important part of bash script, but it is often ignored, resulting in problems in the security and maintainability of the script. When bash executes the script, it will create a new Shell. If there is an error in the execution process, bash will ignore the error and continue to e ...

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preface Network subsystem is the top priority of Linux kernel. Today, we start with the network card driver and start the exploration of the network subsystem. hardware environment Raspberry pie 3B + is equipped with Gigabit network card LAN7515, but it uses USB2 0 channel (the maximum theoretical speed is 480Mbps), and the official Etherne ...

‍ catalogue 1, What is a shell 2, Application scenario of shell script 3, Common shell scripts 4, Summary 1, What is a shell Shell is an application program, which connects users and Linux kernel, so that users can use Linux kernel more efficiently, safely and at low cost. This is the essence of shell. In short, we operate Linux through ...

THE PLANETS:EARTH prepare Attacker: kali Target: the planes: Earth NAT 192.168.91.0 network segment Download connection [https://www.vulnhub.com/entry/the-planets-earth,755/] Information collection and utilization Host discovery https://github.com/czheisenberg/MyCode/blob/master/Scan/scapy/ping.py As shown in the figure, use python s ...

Logic control - condition judgment 1, Realization of conditional judgment ifcase 2, Simple structure of if if condition ; then Actions performed Actions performed fi 1. Writing of conditions shell command Determine the execution status code of the command [expression] Numeric expressionCharacter expressionFile directory expre ...

Add plug-ins to Fcitx framework Fcitx plug-ins can be divided into four categories: 1.Frontend 2.Input Method 3.Module 4.User Interface Frontend plug-in is responsible for interface key messages and passing them to Fcitx framework, InputMethod plug-in is responsible for converting keyboard input into their language information, which is ...

1) Experimental platform: punctual atom STM32MP157 development board 2) Purchase link: https://item.taobao.com/item.htm?&id=629270721801 3) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-318813-1-1.html 4) Official station B of punctual atom: https://space.bilibili.com/394620890 5) Punc ...