Industrial Shields Raspberry PLC 19R+, Быстрое руководство пользователя

Страница: 22 / 53

Rev. 8: 29-04-2021
21
When you start the connection, the terminal window will be opened. Enter your username pi
and press Enter , then enter your password raspberry . If the username and password are
correct, you can start the SSH session.
When an SSH connection is made for the first time, the server delivers the server's public key
to the SSH client. PuTTy will alert you to this and offer you the option of accepting the key or
rejecting it. You have to accept the key, as it will be stored in the register and will be used to
contrast it with the one sent by the server on each connection. If for some reason the key
changes, PuTTy will generate a new notice in which the authenticity of the received key will be
raised, since someone could be posing as the server to which we want to connect.
Once connected, will be a full access to the Raspberry PLC and the user will be able to control
it and set the functions needed. Also new users or the password could be changed as the
device IP. The commands for going through the Raspberry are the same as the Linux terminal.
The most useful are the following:
•
cd: to navigate through the Linux files and directories.
•
ls: is used to view the contents of a directory.
•
cat: it is used to list the contents of a file on the standard output.
•
mkdir: use mkdir command to make a new directory
•
rm: is used to delete directories and the contents within them.
•
touch: allows you to create a blank new file.
For closing the connection, just type exit in the Raspberry terminal.