Paramiko Skeleton

main.py

import paramiko, sys, os

hostname = ''
username = ''
password = ''
PORT = '22'
ssh = paramiko.SSHClient()


def run_local_cmd(your_command):
    print(your_command)
    try:
        os.system(your_command)
    except Exception as err:
        print("Unable to execute local cmd: " + your_command  + " {} " + format(err))
        sys.exit(1)

 
        
def execRemoteCommand(cmd_, client):
    print(cmd_)
    stdin, stdout, stderr = client.exec_command(cmd_)
    output = stderr.readlines()
    output_line = ''.join(output)
    print(output_line)
    output = stdout.readlines()
    output_line = ''.join(output)
    print(output_line)
    
  
def get_arguments():
    
    get_arguments()
    
    try:
        # get arguments hostname username password
        cred = [sys.argv[1], sys.argv[2], sys.argv[3]]
        global hostname
        global username
        global password
        hostname = cred[0]
        username = cred[1]
        password = cred[2]
    except Exception as err:
        print("Unable to get arguments: {}".format(err))
        sys.exit(1)
        

if __name__ == "__main__":

    try:
        ssh_client = paramiko.SSHClient()
        ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh_client.connect(hostname=hostname, username=username, password=password, port=PORT)
        sftp_client = ssh_client.open_sftp()

        # 1. CHANGE PATH ON THE REMOTE SERVER
        print("##########-1.-CHANGE-PATH-##########")
        sftp_client.chdir("/tmp")
        print(sftp_client.getcwd())

        # 2. RUN COMMAND ON REMOTE SERVER
        print("##########-2.-REMOTE-COMMAND-##########")
        execRemoteCommand("ls -l /tmp", ssh_client)

        # 3. COPY FILE TO REMOTE SERVER
        print("##########-3.-REMOTE-COMMAND-##########")
        sftp_client.put("README.md", "README.md")
        execRemoteCommand("stat /tmp/README.md", ssh_client)

        # 4. DOWNLOAD FILE FROM REMOTE SERVER
        print("##########-4.-DOWNLOAD-FILE-##########")
        sftp_client.get("/tmp/remote_file.txt","remote_file.txt")

    except Exception as err:
        print("SSH CLIENT ERROR: {}".format(err))
    finally:
        sftp_client.close()
        ssh_client.close()