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pythonshellsshparamikoqnx

Only pwd command succeeds in Paramiko, others fail with "ksh: ...: cannot execute - No such file or directory"

Successfully able to create an SSH connection between my windows machine and an QNX (~linux) system.

Only command that gets any output (stdout) is 'pwd`.

# SSH Connection stuff

stdin, stdout, stderr = client.exec_command('pwd')
output = stdout.readlines()
error = stderr.readlines()
readback = [output, error]

for index, val in enumerate(readback):
    readback = '\n'.join(val)
    print("%s:\t%s") %(index, readback)

Sample output of 'pwd':

0: /home/rxm
1:

When I change the command from pwd to ls:

0:  
1:  ksh: ls: cannot execute - No such file or directory

I get this same error when trying other simple commands, e.g. pidin, ifconfig, etc.

All the necessary commands works when I use PuTTY and create an SSH connection.

Has anyone seen this behavior. Didn't have a whole luck when going the invoke.shell route either. Thanks.

Solution

  • pwd is probably built in to your shell, whereas all the other commands you're running are not. ls is not found because $PATH is not set, so you can either set the PATH environment variable, or use a full path when invoking commands, such as /bin/ls.