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What is the simplest way to SSH using Python?
SSH (secure shell) is helpful for remotely managing computers in a secure manner. To connect to a server, you typically use PuTTy, MobaXTerm, or the command-line ssh application. Every Unix, Linux, and Mac server includes SSH as standard equipment, and it is usable in every data centre. SSH connections have made it feasible for secure remote access to resources, remote command execution, the transmission of software patches and updates, and other administrative or management tasks.
SSH is used in systems administration and file transfer software, as well as to handle routers, server hardware, virtualization platforms, and operating systems (OSes). Additionally, it creates a secure link between nearby and distant computers.
SSH using Paramiko
The easiest way to install paramiko is using pip
python -m pip install paramiko
The output obtained is as follows.
To check if paramiko is install the following command can be used
pip list
Upon checking, the following is obtained.
Install paramiko using .whl file offline.
To do so, we have to download .whl file https://pypi.org/project/paramiko/#files
pip install paramiko-2.7.2-py2.py3-none-any.whl
We can also clone from GitHub and use setup.py to install something directly from the source code.
git clone https://github.com/paramiko/paramiko cd paramiko python setup.py install
Using Paramiko
To use paramiko, ensure that you have correctly set up SSH
keys(https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.html) on the host machine and when running the python script, these keys are accessible. Once that is done use the following code to connect to a remote server using ssh.
from paramiko import SSHClient
ssh = SSHClient()
ssh.load_system_host_keys()
ssh.connect('user@server:path')
ssh_stdin, ssh_stdout, ssh_stderr = ssh.exec_command('ls')
print(ssh_stdout) #print the output of ls command
Use the paramiko.client to connect to an SSH server. SSHClient.connect(). The only mandatory parameter is the hostname.
connect(hostname, port=22, username=None, password=None, pkey=None, key_filename=None, timeout=None, allow_agent=True, look_for_keys=True, compress=False, sock=None, gss_auth=False, gss_kex=False, gss_deleg_creds=True, gss_host=None, banner_timeout=None, auth_timeout=None, gss_trust_dns=True, passphrase=None, disabled_algorithms=None)
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