Configuration steps for setting up ssh password-free login to linux

Overview

Generate private key file

Enter the following command in the client terminal

ssh-keygen -t rsa

The private key file generated by ssh-keygen -t rsa will be different every time.
If the file "~/.ssh/id_rsa" exists, you will be prompted whether to overwrite the file. At this time, you can choose "n" not to overwrite the file and use the existing one. id_rsa file If "y" is selected, the " _{/.ssh/id_rsa" file}
will be regenerated . _{Next, you will be prompted to enter passphrase, press Enter to confirm using an empty passphrase, and press Enter again to confirm (passphrase can also be output here, which is equivalent to the password for ssh login).} Then the id_rsa file and id_rsa.pub file ( in the /.ssh directory) _{will be regenerated.}

Execute the scp remote copy command in the terminal

scp /Users/shaarawy18/.ssh/id_rsa.pub [email protected]:~/.ssh

Copy the generated id_rsa.pub file to the ~/.ssh directory of the remote server.
At this time, you also need to enter the root user password for access.

Append the public key to the authorized KEY

Enter the following command in the server terminal

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

If the "/.ssh/authorized_keys" file already exists on the remote server _{, you need to edit the "} /.ssh/authorized_keys" file on the server and append the contents of the "id_rsa.pub" file on the client machine to "~/.ssh/ authorized_keys" file.
If there is no "~/.ssh/authorized_keys" file on the server, execute the following command

cp  id_rsa.pub  authorized_keys

That is, copy the public key to the authorized_keys file

Test whether the configuration takes effect

ssh [email protected]

reference

Configuration steps for setting up ssh password-free login to linux