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I'm trying to convert a P12 file to a PEM file. When I execute the command, the terminal asks me for three things:

P12 passphrase (I type it in, hit enter)
PEM passphrase (type it in, hit enter)
PEM passphrase confirm (type it in, hit enter)

I know I can execute a sudo command all in one shot by using the following:

echo sudopassword | sudo rm -rf /file.p12;

How can I add all three values in one shot?

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  • ... just don't lose the file.txt from the end of that command. – bmike♦ Aug 11 '12 at 4:06
  • @bmike Thanks for responding, but could you be more clear? Should I do something like echo password | echo password | echo password | normal command? – abcd Aug 11 '12 at 4:07
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The canonical unix tool for this job is expect.

Here is a short tutorial that should get you going on scripting a series of passwords to be entered when the appropriate prompt is detected by the tool.

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