How do I pass a python string to Linux Command Line? [duplicate]

Question

import time
start_time = time.time()
for i in range (0, 10000):
    print('openssl rsautl -encrypt -pubin -inkey public.pem -in message.txt -out message_enc.txt')
print("--- %s seconds ---" % (time.time() - start_time))

I want to pass the string within the print method to the Linux command line and run it to get the average encryption time of RSA. I can not seem to figure out how to do this though. I could only find out how to pass arguments from the command line into a Python script.

@itsneo, please don't encourage that. os.system() is deprecated in favor of subprocess, and invoking a shell unnecessarily is bad practice (not only inefficient, but often leads to security bugs). — Charles Duffy
– Charles Duffy, Commented Sep 19, 2017 at 4:08
Thanks for linking similar posts. I had no idea to use those keywords. I never want to create duplicate posts. Sometimes I just do not know good keywords to search for. — Dave
– Dave, Commented Sep 19, 2017 at 4:16

Jeremy McGibbon · Accepted Answer · 2017-09-19 04:02:30Z

2

You can do this with the subprocess module, which is built-in to Python.

>>> subprocess.call(["ls", "-l"])
0

answered Sep 19, 2017 at 4:02

Jeremy McGibbon

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1 Comment

Charles Duffy Over a year ago

See "Answer Well-Asked Questions" in How to Answer. Questions which "have already been asked and answered many times before" should be closed, not answered.

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