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shell=Truebenefits me. What kind of thing is better in subprocess?os.system(...)is a reasonable choice for executing commands in terms of simple "blind" execution. However, the use cases are rather limited - as soon as you want to capture the output, you have to use a whole other library and then you start having both - subprocess and os for similar use cases in your code. I prefer to keep the code clean and use only one of them. Second, and I would have put that section at the top but the TL;DR has to answer the question exactly, you should not useshell=True, but instead what I've written in thePreferred Waysection.os.system(...)andshell=Trueis that you're spawning a new shell process, just to execute your command. This means, you have to do manual escaping which is not as simple as you might think - especially when targeting both POSIX and Windows. For user-supplied input, this is a no-go (just imagine the user entered something with"quotes - you'd have to escape them as well). Also, the shell process itself could load code you don't need - not only does it delay the program, but it could also lead to unexpected side effects, ending with a wrong return code.os.system(...)is valid to use, indeed. But as soon as you're writing more than a quick python helper script, I'd recommend you to go for subprocess.run withoutshell=True. For more information about the drawbacks of os.system, I'd like to propose you a read through this SO answer: stackoverflow.com/a/44731082/6685358