[SOLVED] Pass Python variable inside command with Paramiko

Pass Python variable inside command with Paramiko

With this command, I want to save an output of the smartctl command of the sda drive.

Now, since I use RAID, I have multiple drives, not just sda.

The following command works fine:

stdin, stdout, stderr = ssh.exec_command('/bin/su root -c "smartctl -a /dev/sda > /tmp/smartctl_output1"', get_pty=True) # ORIGINAL

I want to achieve that I pass local Python variable "DISK" containing sda, sdb, sdc and so on instead only static value.

The following line produces error:

stdin, stdout, stderr = ssh.exec_command('/bin/su root -c "smartctl -a /dev/" + DISK + " > /tmp/" + DISK', get_pty=True)

Solution

Your question has nothing to do with Paramiko.

It's just a trivial concatenation of strings in Python:

ssh.exec_command(
     '/bin/su root -c "smartctl -a /dev/' + DISK + ' > /tmp/' + DISK + '"',
     get_pty=True)