Update file assembly_exercise.md

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Update file assembly_exercise.md

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Update file assembly_exercise.md

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Update file assembly_exercise.md

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Update file README.md

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Update file README.md

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Update file README.md

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Update file qc_exercise.md

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Update file qc_exercise.md

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Update file qc_exercise.md

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added qc exercise

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Update file UNIX_HPC_cheat_sheet.md

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Update file UNIX_HPC_exercise_instructions.md

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