Some pit avoidance guidelines for using Huawei ECS

One 、 About domain name registration

• Purchase domain name （1 Days or so ）
• Real name authentication （ At first I forgot , The back is mended quickly ）
• Website filing （ Preliminary review modification 3 Time , More than a week , The authority reviews for one week ）20 It should end in days
• DNS analysis ： Create a public domain name 、 Management resolution （ Finally, quickly add parsing in the upper right corner ）, And then it's all right

Two 、 Server installation others Python edition

• Reference resources ： How to use apt stay ubuntu18.04 Installation on python3.8
  Use apt stay ubuntu18.04 Installation on python3.8 Methods ：

1. Open terminal window .

2. Enter the following command to update the list of packages and install prerequisites .

sudo apt update
sudo apt install software-properties-common

3. Entering the following command will deadsnakes PPA Add to the source list of the system .

sudo add-apt-repository ppa:deadsnakes/ppa

4. When prompted , Press Enter continue installation .

5. When the repository is enabled , Type the following command to install python3.8.

sudo apt install python3.8

6. Finally, you can use the following command to verify whether the installation is successful .

python3.8 --version

3、 ... and 、 establish Python A virtual environment

• install virtualenv

pip3 install virtualenv

• cd Enter the location where you need to install the virtual environment

virtualenv pyenv( Environment name ) --python=python3.8 

Four 、 About SSH Remote connection Vscode

Generally not installed , First install... On the server SSH service

Ubuntu install SSH service

sudo apt install openssh-server

Encounters an error ：
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

【 Solution 】, I installed solution 2 in the article .

sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock*
sudo dpkg --configure -a
sudo apt update

You think it's over ？

#  Re install 
sudo apt install openssh-server
#  The following error occurred 
E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. 
#  Input according to the prompt 
sudo dpkg --configure -a
#  then , You have successfully installed 

Set up firewall

sudo ufw allow ssh

see SSH Service status

systemctl status ssh

Until here , I am excited to go to the local test , The result is wrong

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is...
...

Then look up the errors , eureka 【 Solution 】, The reason for the error is that ： for the first time SSH When the connection , Will generate an authentication , Store on client （ Also is to use SSH The one that connects to other computers , The one who operates by himself ） Medium known_hosts, But if the server has been verified , Of course, the certification information will also change , The server is different from the client , There will be mistakes ～ therefore , Just delete the authentication information from the computer , Regenerate... On connection , It's all perfect ～ It's easy to delete , Just type a command on the client side

ssh-keygen -R + Enter the... Of the server IP

Next, connect again , There will be

Are you sure you want to continue connecting (yes/no)?

Input yes, You can complete the connection , use windows Terminal connection to server

ssh [email protected] Server address