There was no problem using ssh before, but there was a problem after updating to ubuntu20. I will record the problem now.
All the articles on the Internet say that there is a PermitRootLogin in /etc/s...
After watching the live broadcast review, if you have any questions, you can post them in the thread and Guanzi will help feedback to Xianji officials for answers.Live broadcast time: 20:00-21:00 on J...
1. IntroductionUsing MixPY and MixNO development board hardware and MixPY software platform, we will give full play to the computing power of AI K210 chip, introduce the concept of machine vision, sta...
[i=s]This post was last edited by Niubility-a on 2018-12-17 11:55[/i] [align=left]Android system architecture[/align][align=left]Android system architecture is the architecture of the Android system. ...
High brightness, high definition and good color have become the three elements for smart projection products to occupy the market. Compared with traditional bulbs and lasers, the application of LED l...[Details]
By Bruce Haug background knowledge There are signs that the revolution of self-driving cars is about to come. Automotive companies are working with tech giants such as Google and Uber, as well a...[Details]
1. The process of reading instructions from the program area outside the microcontroller chip When the power is turned on and the microcontroller is reset, the program counter PC-OOOOH, and th...[Details]
Taiwan's leading IC design company MediaTek announced yesterday (12th) that in response to business expansion needs, it has launched the largest-ever recruitment drive in the group, expecting to recr...[Details]
When measuring voltage with a multimeter, there are eight things to note. Know the internal resistance of the meter and be sure to have someone supervise it. The circuit meters under test are connect...[Details]
The most common reason why the pointer cannot be adjusted to zero when the two test rods are short-circuited is that the battery voltage is insufficient. New batteries should be replaced. Secondly, ...[Details]
The network is developing rapidly, and more and more users are using the network. As users become more dependent on the network, the normal operation of the network becomes more and more important....[Details]
Nidec Instruments Co., Ltd. (formerly Nidec Sankyo), a group company of Nidec Corporation, has developed a liquid crystal substrate handling robot that can operate in a vacuum environment and has...[Details]
From the perspective of product definition planners,
the two most important
power design
indicators
for portable devices
are continuous working time and standby time. So, for a syste...[Details]
The parallel P3 port of the MCS-51 series microcontroller is a multi-function port. Its first function is a quasi-bidirectional port, which can be used as a general I/O port. Its characteristics are ...[Details]
On January 11, OnePlus held a new product launch conference called "10 Deserves the Name" and released the OnePlus 10 Pro mobile phone, which is equipped with a new generation of Snapdragon 8...[Details]
A logic analyzer is an instrument that uses a clock to collect and display digital signals from a test device. Its main function is to determine the timing. Unlike an oscilloscope, a logic analy...[Details]
The main reasons are as follows: Everyone knows that the principle of the live cable identification instrument is: when a 50HZ current flows through the running cable, it will generate an alterna...[Details]
For a long time, urban residents in northern my country have been charged for heating based on residential area rather than actual heat consumption, which has led to poor energy-saving awareness am...[Details]
Wireless transmission has become an application trend in embedded systems that require data transmission. GPRS (General Packet Radio Service) has the advantages of always being online, fast login, ...[Details]
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