ssh remote command with list

[pythonnew]

Hello I am new to python. trying to use a list to ssh to my remote server

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#!/usr/bin/python import subprocess   node = ['node41', 'node42', 'node52'] link = ['eth0', 'eth0', 'eht0']   for i in range(len(node)):        print node[i], s16d1[i]        subprocess.call(["ssh", node[i], 'ip link show s16d1[i]'])

getting his error

Error:
Device "link[i]" does not exist.

How can I pass device link from the list ssh remote command?

thanks,

[DeaD_EyE]

How can I pass device link from the list ssh remote command?

In shell you do it via:

1	ssh host "command"

Command is one argument.

In Python you've to use a list. Each element is a argument, the first argument is the binary itself.

1 2	command = ['ssh', 'node', 'ip link show eth0'] stdout = subprocess.check_output(command)

I think you're using Public-Key authentication. If you want to use password authentication, you have to do it different. There is a module for it: http://www.paramiko.org/

Finally this should work with Python 2.7 and Python 3.x:

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#!/usr/bin/python from __future__ import print_function # to be compatible with Python 3.x, print is since Python 3 a function and no longer a statement from subprocess import check_output # using check_output instead of using Popen # call returns the exit code     def get_links(nodes, links):    for node, link in zip(nodes, links):         # zip can zip lists together         # and assigned to node, link         # now format the command for the target host         ip_command = 'ip link show {}'.format(link)         # finally make a list for the ssh command         command = ['ssh', node, ip_command]         # save output to stdout         stdout = check_output(command)         # just print it. You can process also the output         print(stdout.decode())         # or         # return stdout      def main():     # use plural for lists and not singular     nodes = ['node41', 'node42', 'node52']     links = ['eth0', 'eth0', 'eht0']     get_links(nodes, links)     if __name__ == '__main__':     main()

[pythonnew]

Thanks DeaD_EyE!
You hint of "ip_command = 'ip link show {}'.format(link)" helped

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#!/usr/bin/python import subprocess   node = ['node41', 'node42', 'node52'] link = ['eth0', 'eth0', 'eht0']   for i in range(len(node)):      ip_command = 'ip link show {}'.format(link[i])        print ip_command        subprocess.call(["ssh", node[i], ip_command])