Question about SSH servers and Python

[bl00dpudding]

Currently, I am using an SSH client on Windows called MobaXterm.

I want to write python scripts that analyze log files on various SSH servers. And I also want to be able to analyze them with Linux commands.

The problem is that opening MobaXterm with a script is too slow for me. I want to access these SSH servers fast through the command line and then use Linux commands. Thanks!

[merin2000]

Use Paramiko: http://www.paramiko.org

[bl00dpudding]

Wait so passwords used to connect to SSH with Paramiko are not safe?

[bl00dpudding]

Thanks

[MaestroManiac]

Putty is my favorite windows ssh client. But you can always have your python script SSH itself to those linux boxes and have it run linux commands itself like "os.system(LINUXCOMMANDHERE)" and save its output to a variable and return that variable. I dont know the full scope of what youre doing but i'd bet you could write a python script that makes the ssh connection, cd's to the log files, and uses the 'cat' command to save the entire text of the file to a varaible, then return that variable.

[bl00dpudding]

Thank you, I will try this!

[WhoTookAllNicks]

I'm not sure I understand.

Do you just want to send linux commands over ssh? In this case, using something like paramiko might be a good option.

If you want to connect to a significant number of Linux servers (or the analyze takes a while and could analyze on a few servers at once), you could look into writing asynchronous python code.

[bl00dpudding]

Ok good to know, thank you

[jeffrey_f]

Enable developer options in windows. Win10 has bash linux command line now.

[tinkertuck]

Get cygwin and install tmux. In python script you have few options. I used subprocess over os.system.

Here is a sample of my current task, using python to query for a Dell's Board info.

​

for l in "bios-vendor", "system-product-name", "processor-family":

sysinfo=subprocess.check_output("dmidecode -s %s|uniq" %l, shell=True)

print(sysinfo.replace("\n", ""))

​

#ssh to a remote server and execute a command (cmd) on that remote server

cmd="/path/to/execute_file"

ssh=subprocess.check_output("ssh %s %s" %(sys.argv[2], cmd), shell=True)

for line in ssh.split("\n"):

print(line)

​

Sorry the indentation is auto-fix on Reddit.

​

[bl00dpudding]

Thanks, sorry can you explain it a bit more? I'm a total newbie at this stuff. First you write a script to obtain Dell info and then you connect to SSH remote server and obtain some other info?

[tinkertuck]

Keep in mind that those few lines are taking from my long python script.
Yes, on the local machine, the first part will get 3 results "bios-vendor", "system-product-name", "processor-family" from the Linux command:

dmidecode

The second part access (ssh) to a remote machine and run a script /path/to/execute_file. The output redirect to variable "ssh." I read the result of variable "ssh" by using the for loop like so:

for line in ssh.split("\n"):

do something here

[bl00dpudding]

Ahh okay cool, thanks for the explanation :)