1. sshd_config, which is located in the/etc/ssh path.
2. It is recommended that you use at least a 2048-bit encryption.
3. We must set the PermitRootLogin variable to no.
4. You can implement an interactive shell using paramiko. That way, the channel does not close after a command is executed in the remote shell. After creating SSHClient, using connect, you can use the invoke_shell() method, which will open a channel that it doesn't close after you send something through it.
5. The way paramiko creates SFTP session for downloading files in a secure way from a SSH server is as follows:

import paramiko
ssh_transport = paramiko.Transport(hostname, port)
ssh_transport.connect(username='username', password='password')
sftp_session = paramiko.SFTPClient.from_transport(ssh_transport)sftp_session.get(source_file, target_file)

6. To retrieve the binary file from the remote host, the syntax that's shown here can be used, along with the RETR command: ftp_client.retrbinary('RETR remote_file_name', file_handler.write).
7. FTP.nlst(path).
8. We can use the following command:

from pysnmp.entity.rfc3413.oneliner
import cmdgen cmd_generator = cmdgen.CommandGenerator()

9. The directory service is the hierarchically organized structure of the objects in the LDAP directory.
10. We can use the following method:

import ldap
ldap_client = ldap.initialize("ldap://<ldap_server>:port_number/")