 | Simple, classical Unix shell scripts are widely used to replace sequences of manual steps in a terminal window
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| Such scripts are crucial for scientific reliability and human efficiency!
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| Shell script newbie? Wake up and adapt this example to your projects!
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| Typical situation in computer simulation:
 | run a simulation program with some input
| | run a visualization program and produce graphs
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| Programs are supposed to run from the command line, with input from files or from command-line arguments
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| We want to automate the manual steps by a Python script
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