The ssh command is a client connection command that can securely log in to a remote server
First make sure that ssh is installed on the machine, use ssh -v to check the ssh version
If not installed, use the command yum install ssh to install
Generate a pair of secret keys (private key, and public key) through ssh-keygen -t rsa,
Keep pressing Enter, novices are advised not to set a password
When creating a generation, it will feedback the location of the generated key, such as in the /root/.ssh/ directory
Note that the .ssh directory is hidden, use the ls -a command to view all files in all current directories
The public key can be shared with others. By adding the keys of the corresponding user on the remote server, the client can send a request to connect through the ssh command
ssh -p 22 username@server IP -i /root/.ssh/id_rsa #(path where the private key is located)
Connection using root user
About ssh parameters use man ssh to view
cat /proc/vesion to see the running kernel version