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Issue description:  feedback from learner dave.cronin@fiscal.treasury.gov :

De Costa's solution review does not match the solution of the lab. It looks like a repurposed video from 9.0. I rechecked my work 5-times before swallowing my pride, to look at the solution, only to find there is a mismatch in the video solution and the actual solution. I give RHEL quality control a 5 out of 10 on checking the consistency of the section of the course

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