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Preliminary learning of character device-driven notes. 1. Driver module commands In linux, when a driver is compiled in a modular mode, it is not directly active as the system starts, but lying quietly in a corner of the kernel, which is not available. Applications that want to invoke the driver must load it before they can use it. There ...

catalogue 1, inode and block overview 1. block 2. inode (index node) 3. inode content 4. cp and inode 5. mv and inode 6. Structure after hard disk partition   7. Simple process of accessing files   8. inode size   9. Special role of inode 2, Hard link and soft link 1. Hard link 2. Soft link 3. The difference between ...

1) Experimental platform: punctual atom alpha Linux development board 2) Platform purchase address: https://item.taobao.com/item.htm?id=603672744434 2) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-300792-1-1.html 3) Students interested in punctual atomic Linux can add group discussion: 93 ...

Linux+Nginx deployment Vue project (dist file) Project scenario: Project scenario: Linux deployment Vue project Idea: 1. Package the Vue project into dist package 2. Upload dist package to the server 3. Install Nginx 4. Configure Nginx[nginx.conf] 5. Restart Nginx Operation: 1.1 package dist file: [problems encountered during pack ...

Linux three swordsmen grep describe grep – global search regular expression(RE) and print out the line; grep is a text search tool, which can use regular expressions to filter or search text and print matching lines; Mode of use Common options optiondescribe-A <n>Display the filtered text line and the n lines after the line-B ...

Linux multithreading development thread Thread overview Like a process, a thread is a mechanism that allows an application to execute multiple tasks concurrently. A process can contain multiple threads. All threads in the same program will execute the same program independently and share the same global memory area, including initialize ...

gdb tool is one of the necessary tools to develop under Linux Generally speaking, gdb mainly helps you complete the following four functions: 1) Start your program, and you can run the program as you like according to your custom requirements. 2) Allows the debugged program to stop at the breakpoint you set. (breakpoints can be conditional e ...

Topic communication Principle of topic communication Topic communication has three roles: ROS Master (Manager)Talker (publisher)Listener (subscriber) The Master is responsible for linking publishers and subscribers to publish and subscribe links through the same topic. After the link, the publisher and subscriber can continuously publish ...

Preface Firewall is just like the Great Wall of China. It is used to protect the people inside the wall from outside malicious invasion. So is the firewall of Linux. It can filter and restrict data packets, which is the package filtering firewall to be explained in this paper. 1. Packet Filtering Firewall 1. Understanding the packet filt ...

awk 1, Introduction AWK is a language for processing text files and a powerful text analysis tool. AWK is called because it takes the first character of the Family Name of the three founders Alfred Aho, Peter Weinberger, and Brian Kernighan. 2, Basic grammar //awk [options] 'script command' file name awk [Option parameters] 'script' va ...