What does it mean to “execute a command in memory”?

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If I open a terminal and use the following commands, are they "run in memory"?



$ curl -s http://website.com/file.py | python - &

$ command=$(curl -s http://website.com/file.py); $(echo $command | python - &)


(I'm not sure that second example will actually work. I was just trying to come up with an example that utilized variables.)



In macOS (or any Unix system), what does it mean to run a command in memory?



Here's a Windows example. I'm trying find a Unix description or example usage of the concept.






debian ubuntu command-line osx memory







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    This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
    – Michael Homer
    9 mins ago






  • 1




    This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
    – Anthony Geoghegan
    4 mins ago











  • updated the post
    – user318042
    1 min ago














up vote
-1
down vote

favorite












If I open a terminal and use the following commands, are they "run in memory"?



$ curl -s http://website.com/file.py | python - &

$ command=$(curl -s http://website.com/file.py); $(echo $command | python - &)


(I'm not sure that second example will actually work. I was just trying to come up with an example that utilized variables.)



In macOS (or any Unix system), what does it mean to run a command in memory?



Here's a Windows example. I'm trying find a Unix description or example usage of the concept.






debian ubuntu command-line osx memory







share|improve this question









New contributor




user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.















  • 2




    This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
    – Michael Homer
    9 mins ago






  • 1




    This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
    – Anthony Geoghegan
    4 mins ago











  • updated the post
    – user318042
    1 min ago












up vote
-1
down vote

favorite









up vote
-1
down vote

favorite











If I open a terminal and use the following commands, are they "run in memory"?



$ curl -s http://website.com/file.py | python - &

$ command=$(curl -s http://website.com/file.py); $(echo $command | python - &)


(I'm not sure that second example will actually work. I was just trying to come up with an example that utilized variables.)



In macOS (or any Unix system), what does it mean to run a command in memory?



Here's a Windows example. I'm trying find a Unix description or example usage of the concept.






debian ubuntu command-line osx memory







share|improve this question









New contributor




user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











If I open a terminal and use the following commands, are they "run in memory"?



$ curl -s http://website.com/file.py | python - &

$ command=$(curl -s http://website.com/file.py); $(echo $command | python - &)


(I'm not sure that second example will actually work. I was just trying to come up with an example that utilized variables.)



In macOS (or any Unix system), what does it mean to run a command in memory?



Here's a Windows example. I'm trying find a Unix description or example usage of the concept.






debian ubuntu command-line osx memory




debian ubuntu command-line osx memory






share|improve this question









New contributor




user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









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user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









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edited 1 min ago





















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user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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user318042 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







  • 2




    This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
    – Michael Homer
    9 mins ago






  • 1




    This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
    – Anthony Geoghegan
    4 mins ago











  • updated the post
    – user318042
    1 min ago












  • 2




    This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
    – Michael Homer
    9 mins ago






  • 1




    This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
    – Anthony Geoghegan
    4 mins ago











  • updated the post
    – user318042
    1 min ago







2




2




This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
– Michael Homer
9 mins ago




This post (and the copy on Information Security) are the only uses of this phrase, so it seems to be one you've come up with. What does it mean? Or, where did you find it?
– Michael Homer
9 mins ago




1




1




This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
– Anthony Geoghegan
4 mins ago





This question is unclear. As Michael points out, "run in memory" is not a common term. You should edit the question to provide some context, e.g., where you came across this term, what other ways do commands run other than "in memory", etc. See How to Ask.
– Anthony Geoghegan
4 mins ago













updated the post
– user318042
1 min ago




updated the post
– user318042
1 min ago















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