Programmer Think

1, A brief analysis of the source code of the built-in key driver The Linux kernel also comes with a KEY driver. If you want to use the KEY driver of the kernel, you need to configure the Linux kernel. However, the KEY driver is enabled by default in the Linux kernel, but we still need to check it. Follow the following path to find the corresp ...

1. Types of load balancing 1. Solve through hardware. Common hardware includes commercial load balancers such as NetScaler, F5, Radware and Array, which are expensive and are generally used in hundreds of thousands or even millions of Internet applications. 2. Solve through software. Common software include LVS, Nginx, apache, etc. they are ...

catalogue 1, Condition test 1.1.test command 1.2. File test 1.3. Integer value comparison 1.4. string comparison 1.5. Logic test 2, if statement 2.1. Single branch structure 2.2. Double branch structure 2.3. Multi branch structure 2.4. Nested if statement 3, case statement 4, Summary 1, Condition test 1.1.test command Test whet ...

4G communication There are many restrictions on using wired network or WIFI, because to route, even WIFI has to route first, and then connect to a router. Therefore, in the case of inconvenient wiring, you can connect to the network through 4G. The following describes how to use 4G in I.MX6U-ALPHA development board to realize networking functi ...

preface When we are developing on linux platform, we will basically encounter time-related operations. This paper analyzes and summarizes the commonly used time-related structures and interfaces. Common types and structure definitions timespec prototype struct timespec { __time_t tv_sec; /* Seconds. second */ __syscall_slong_t tv_nsec ...

Chapter 1 Configuring the esp-idf Development Environment Link to the official esp32 Programming Guide The author uses esp32 development board Step 0 Brainless Copy Configuration Ubuntu System Selection When choosing a Ubuntu system, try to choose Ubuntu version 14 or higher. Because some of the tools in Lexin's official SDK are implemente ...

1 - intranet penetration Intranet penetration, that is, intranet mapping, can turn the LAN into a public network, so that the external network can access the services in the local LAN. There are several intranet penetration principles and technologies: 1. Forward through public network server, which is the intranet penetration service mode of m ...

1. Program memory layout   the virtual address space of a process generally contains several parts: The part used by the kernel is inaccessible to the process, and different systems occupy different sizes;Stack memory: it is used to maintain the temporary variables and function calls of the program, and the allocation and destruction are ...

Intrusion detection windows I Account, process, self start ① Detection account 1. Direct analysis in Windows Open the cmd window and enter lusrmgr MSc command to check whether there is a suspicious account 2. Log analysis "eventvwr.msc #Event viewer and export Windows log -- Security #Analyze with Log Parser Typical command 1,Query th ...

format string vulnerability Introduction to formatting strings Common formatting string functions functionBasic introductionprintfOutput to stdoutfprintfOutput to the specified FILE streamvprintfFormat the output to stdout according to the parameter listvfprintfFormat the output to the FILE stream according to the parameter listsprintfOutpu ...