You can use the ssh command to connect to an SSH server and execute commands using the SSH protocol.
Describe the connection destination as follows. If you omit the user name, it will be the same as the local user.
This is a sample to connect with ssh.
Specify the port number
Use the "-p" option to specify the port number to connect to with the ssh command.
ssh -p 55555 email@example.com
Default private key used by ssh command
The default private key used by the ssh command is:
Specify the private key file
You can specify the private key file with the "-i" option for the private key. In the case of a relative path, it will be the path from "~/.ssh".
ssh -i id_rsa_example firstname.lastname@example.org ssh -i /path/id_rsa_example email@example.com
Setting to use by specifying the private key file when SSH connection to a specific domain
You can use the configuration file "~/.ssh/config" to specify the private key file for SSH connection to a specific domain.
This is a sample setting to use the private key created when connecting to Github via SSH. Add to "~/.ssh/config".
Host github github.com HostName github.com IdentityFile ~/.ssh/id_rsa_github User git
Let's also set the permission to 600.
chmod 600 ~/.ssh/config