Command executed with Paramiko does not produce any output

Question

When I try to do

stdin, stdout, stderr = client1.exec_command(\'glass-version\')
print stdout.readlines()

I am getting an empty output.

Answer 1

If you get no output on stdout, it is usually because the command fails to start.

Read stderr (stderr.readlines()) to check for any errors.

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Quite often the error is "<command> not found". For that see
Some Unix commands fail with "<command> not found", when executed using Python Paramiko exec_command