Network remote access using raspberry pie

One 、 Software preparation

1. Raspberry pie mirror image

Official website ：Raspberry Pi OS – Raspberry Pi

2.SDCardFormatterv5

SD Memory Card Formatter | SD Association (sdcard.org)

3. Burning tools Raspberry Pi

Raspberry Pi

4.putty

Download PuTTY: latest release (0.77) (greenend.org.uk)

Two 、 operation

SD Card format

Open it up and download okay SDCardFormatter Take us SD Format the card

  Format successful

burn

Open our burning tool , Select the image we want to burn and the SD Click burn on the card

Burning succeeded after waiting for a period of time

  The network configuration

  open SD card , stay boot Create a directory SSH file

Create an empty text file wpa_supplicant.conf

Enter... In the text

country=CN
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
	ssid=" Your wireless network name "
	psk=" Your wireless password "
	key_mgmt=WPA-PSK
	priority=1
}

  take SD Unplug the card, insert the raspberry pie and connect the power to the raspberry pie , You can see on your phone that raspberry pie has been connected , Check out the raspberry pie ip Address , You can download one Advanced IP Scanner, Open terminal input ipconfig, View the wireless hotspot IP Address , And then in IP Scanner Mid search

  Make sure that our computers are also connected to mobile phone hotspots , notice ip The address is 192.168.79.57, Search while searching 192.168.79.1-255 

That's how we found our raspberry pie IP Address

 putty Remote connection

open putty, stay putty Enter the just ip, Then establish a connection , Enter the default user password

Default user ：pi
The default password ：raspberry

If the default account password is incorrect , Can be in boot Create a userconf.txt file , This file is a single line of text , from  username: User name content -password: password   form —— That is, the desired user name , Follow a colon , Followed by an encrypted representation of the password to be used .

Or configure the account and password when writing the image

  Then enter our account and password again to enter the system

Configure raspberry pie sudo raspi-config 

And then choose interface options 

  open VNC service

  Then open the VNC Viewer

Type in the raspberry pie ip, Then enter the account and password

  And it worked .

3、 ... and 、 Create an account and create... In your personal folder assert Assertion c Program

Create user

Open the terminal and input the command

su -
useradd -m -s /bin/bash  user name 

// password 
passwd  user name 

When the permission is not enough, you can su prefix sudo that will do

Then go to the created folder /home/ user name / in

create a file assert.c, Enter in file

#include <assert.h>
#include <stdio.h>
 
int main()
{
   int a;
   char str[50];
     
   printf(" Please enter an integer value ： ");
   scanf("%d", &a);
   assert(a >= 10);

   printf(" The integer entered is ： %d\n", a);
    
   printf(" Please enter the string ： ");
   scanf("%s", str);
   assert(str != NULL);

   printf(" The input string is ： %s\n", str);
    
   return(0);
}

If you cannot create a file, you can use the command

sudo chmod -R 777 / working directory 
touch assert.c
vim asssert.c

And then you can edit  

And then use gcc Compile the

Four 、 Use scp The command is on two Linux Data transmission between systems

scp

scp yes secure copy Abbreviation , yes linux Based on ssh Log in for secure remote file copy command .scp It's encrypted. ,rcp It's not encrypted ,scp yes rcp The enhanced .

because scp The transmission is encrypted , It may affect the speed a little . in addition ,scp It doesn't take up resources , It will not increase the system load much , At this point ,rsync It's far less than that . although rsync Than scp It will be faster , But when there are lots of small files ,rsync It will cause the hard disk I/O Very high , and scp Basically does not affect the normal use of the system .

Basic grammar shi

scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
[-l limit] [-o ssh_option] [-P port] [-S program]
[[[email protected]]host1:]file1 [...] [[[email protected]]host2:]file2


// Parameter description 
-1：  mandatory scp Command usage protocol ssh1
-2：  mandatory scp Command usage protocol ssh2
-4：  mandatory scp The command only uses IPv4 Addressing 
-6：  mandatory scp The command only uses IPv6 Addressing 
-B：  Use batch mode （ Do not ask for transmission password or phrase during transmission ）
-C：  Allow compression .（ take -C The sign is passed on to ssh, To turn on compression ）
-p：  Keep the modification time of the original document , Access time and access rights .
-q：  Do not show transfer progress bar .
-r：  Recursively copy the entire directory .
-v：  Detailed display output .scp and ssh(1) The debugging information of the whole process will be displayed . This information is used to debug connections , Validation and configuration issues .
-c cipher：         With cipher Encrypt the data transmission , This option will be passed directly to ssh.
-F ssh_config：     Designate an alternative ssh The configuration file , This parameter is passed directly to ssh.
-i identity_file：  The key file used to read the transfer from the specified file , This parameter is passed directly to ssh.
-l limit：          Limit the bandwidth that users can use , With Kbit/s In units of .
-o ssh_option：     If you are used to using ssh_config(5) Parameter passing method in ,
-P port：           Notice that it's capital P, port Is the port number used for data transmission 
-S program：        Specify the program to use when encrypting the transmission . This procedure must be able to understand ssh(1) The option to .

example

Download on virtual machine and raspberry pie respectively ssh

 

  Put the raspberries in the pie you practiced before assert.c Upload the file to the virtual machine

scp -r [email protected]:/home/lm/assert.c ./

complete

5、 ... and 、 Reference resources

(126 Bar message ) Raspberry pie doesn't need a display VNC Viewer Remote connection by _HarrietLH The blog of -CSDN Blog _ Raspberry pie has no screen vnc

Linux scp command - You know (zhihu.com)