paramiko | 易学教程

Creating multiple SSH connections at a time using Paramiko

阅读更多关于 Creating multiple SSH connections at a time using Paramiko

问题 The code below runs grep in one machine through SSH and prints the results: import sys, os, string import paramiko cmd = "grep -h 'king' /opt/data/horror_20100810*" ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect('10.10.3.10', username='xy', password='xy') stdin, stdout, stderr = ssh.exec_command(cmd) stdin.write('xy\n') stdin.flush() print stdout.readlines() How can I grep five machines all at once (so that I don't have major delay), than put

Paramiko: Port Forwarding Around A NAT Router

阅读更多关于 Paramiko: Port Forwarding Around A NAT Router

问题 Configuration LOCAL: A local machine that will create an ssh connection and issue commands on a REMOTE box. PROXY: An EC-2 instance with ssh access to both LOCAL and REMOTE. REMOTE: A remote machine sitting behind a NAT Router (inaccessible by LOCAL, but will open a connection to PROXY and allow LOCAL to tunnel to it). Port Forwarding Steps (via command line) Create an ssh connection from REMOTE to PROXY to forward ssh traffic on port 22 on the REMOTE machine to port 8000 on the PROXY server.

Long-running ssh commands in python paramiko module (and how to end them)

阅读更多关于 Long-running ssh commands in python paramiko module (and how to end them)

I want to run a tail -f logfile command on a remote machine using python's paramiko module. I've been attempting it so far in the following fashion: interface = paramiko.SSHClient() #snip the connection setup portion stdin, stdout, stderr = interface.exec_command("tail -f logfile") #snip into threaded loop print stdout.readline() I'd like the command to run as long as necessary, but I have 2 problems: How do I stop this cleanly? I thought of making a Channel and then using the shutdown() command on the channel when I'm through with it- but that seems messy. Is it possible to do something like

How to create a ssh tunnel using python and paramiko?

阅读更多关于 How to create a ssh tunnel using python and paramiko?

I'm learning python. I need to tunnel creators to read information from a database and close the tunnel. I use paramiko but I have not worked with tonelem example. please give an example of a simple code creates a tunnel. Thanks in advance! dario At work we usually create ssh tunnels forwarding ports. The way we do that is, by using the standard command ssh -L port:addr:port addr with subprocess running in a separate thread. I found this useful link: https://github.com/paramiko/paramiko/blob/master/demos/forward.py with an example of doing port forwarding with paramiko. I used sshtunnel for my

How to download only the latest file from SFTP server with Paramiko?

阅读更多关于 How to download only the latest file from SFTP server with Paramiko?

问题 I want to write script that connects to my university SFTP server and downloads the latest file with exercises. So far I've changed a little bit the code from Paramiko example, but I do not know how to download the latest file. Here is my code : import functools import paramiko class AllowAnythingPolicy(paramiko.MissingHostKeyPolicy): def missing_host_key(self, client, hostname, key): return adress = 'adress' username = 'username' password = 'password' client = paramiko.SSHClient() client.set

Nested SSH using Python Paramiko

阅读更多关于 Nested SSH using Python Paramiko

问题 I have this scenario: Local-host --------- jump-host ------- target-machine I am trying to write a code in Python using Paramiko to first SSH from local-host to jump-host and then SSH from jump-host to the target-machine. From the target-machine, I want to capture some outputs and store them locally either as a variable or as a file (haven't got to that point yet). I found an example from Stack Overflow where they talk about using nested SSH with Paramiko, and I follow it but I get stuck here

Paramiko : Error reading SSH protocol banner

阅读更多关于 Paramiko : Error reading SSH protocol banner

问题 Recently, I made a code that connect to work station with different usernames (thanks to a private key) based on paramiko. I never had any issues with it, but today, I have that : SSHException: Error reading SSH protocol banner This is strange because it happens randomly on any connections. Is there any way to fix it ? 回答1: It depends on what you mean by "fix". The underlying cause, as pointed out in the comments, are congestion/lack of resources. In that way, it's similar to some HTTP codes.

python之并发编程

阅读更多关于 python之并发编程

一背景知识顾名思义，进程即正在执行的一个过程。进程是对正在运行程序的一个抽象。进程的概念起源于操作系统，是操作系统最核心的概念，也是操作系统提供的最古老也是最重要的抽象概念之一。操作系统的其他所有内容都是围绕进程的概念展开的。所以想要真正了解进程，必须事先了解操作系统，点击进入 PS：即使可以利用的cpu只有一个（早期的计算机确实如此），也能保证支持（伪）并发的能力。将一个单独的cpu变成多个虚拟的cpu（多道技术：时间多路复用和空间多路复用+硬件上支持隔离），没有进程的抽象，现代计算机将不复存在。必备的理论基础： #一操作系统的作用： 1：隐藏丑陋复杂的硬件接口，提供良好的抽象接口 2：管理、调度进程，并且将多个进程对硬件的竞争变得有序 #二多道技术： 1.产生背景：针对单核，实现并发 ps：现在的主机一般是多核，那么每个核都会利用多道技术有4个cpu，运行于cpu1的某个程序遇到io阻塞，会等到io结束再重新调度，会被调度到4个 cpu中的任意一个，具体由操作系统调度算法决定。 2.空间上的复用：如内存中同时有多道程序 3.时间上的复用：复用一个cpu的时间片强调：遇到io切，占用cpu时间过长也切，核心在于切之前将进程的状态保存下来，这样才能保证下次切换回来时，能基于上次切走的位置继续运行本文将将着重介绍进程以及它的亲戚->线程二

SSH key generated by ssh-keygen is not recognized by Paramiko: “not a valid RSA private key file”

阅读更多关于 SSH key generated by ssh-keygen is not recognized by Paramiko: “not a valid RSA private key file”

I have the following code: ssh_key = paramiko.RSAKey.from_private_key_file(key_filename) the key looks like this: -----BEGIN OPENSSH PRIVATE KEY----- b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAABFwAAAAdzc2gtcn NhAAAAAwEAAQAAAQEAqdgmJ2AQlmvpCsDWjbpIvIrx4AwtKn2t10wmGZIN9pqcJgQpo3HD and is valid: $ ssh-keygen -l -f <mykeyfile> $ 2048 SHA256:x8jlUAObU3q2KXRtuGpxwhnGvB/ZoeD2IUqSA1OkCmI thomas@Thomas-MBP-2017 (RSA) but I get the the following error: not a valid RSA private key file This is on MacOS, Python 2.7, Paramiko 2.4.2 What am I doing wrong? For OpenSSH 7.8 up, you have to trick it

How to execute a script remotely in Python using SSH?

阅读更多关于 How to execute a script remotely in Python using SSH?

def execute(self,command): to_exec = self.transport.open_session() to_exec.exec_command(command) print 'Command executed' connection.execute("install.sh") When I check the remote system, I found the script didn't run. Any clue? The code below will do what you want and you can adapt it to your execute function: from paramiko import SSHClient host="hostname" user="username" client = SSHClient() client.load_system_host_keys() client.connect(host, username=user) stdin, stdout, stderr = client.exec_command('./install.sh') print "stderr: ", stderr.readlines() print "pwd: ", stdout.readlines() Note,