My Linux script is as below to ssh to host & search patch update which has kernel update

```
 for host in `cat patch.csv`
    do 
      echo "Host $host" >> /tmp/patching
      ssh -o "UserKnownHostsFile=/dev/null" -o "StrictHostKeyChecking=no" $host  'sudo yum check-update | grep "kernel.x86"'>>/tmp/patching
    done

```

Now i am trying to write a python script equivalent to this & its showing error(not able to conenct to ssh). I tried to use subprocess comamnd which is not working - its not able to pick up hostname & public key error.

```
import subprocess
import os
def read_file():
    # Read and print the entire file line by line
    with open('patch.csv', 'r') as reader:
        with open('server_names.txt', 'w') as writer:
            for host in reader:
                writer.write(host)
                p = subprocess.Popen(["ssh -o 'UserKnownHostsFile=/dev/null' -o 'StrictHostKeyChecking=no' host 'sudo yum check-update | grep kernel.x86'"], shell=True, stdout=subprocess.PIPE)
                output, err = p.communicate()
                print(host)
    print("file read done")

read_file()

```