On the top of page 8 you give the following command: ansible example -a "free -m" -u [username]. The text below it states:
"In this example, we quickly see memory usage (in a human readable format) on all the servers (for now, just one) in the example group."
Below is the output of the command in my environment:
To my eye, the output does not appear to be human-readable.
For the command output to be human-readable, I believe you have the wrong flag and instead the command should be the following: ansible example -a "free -h" -u [username]. Below is the output of the above command:
Also, I'm not sure if you care about this or not, but grammatically "human readable" might need to be changed to "human-readable" (or at least says Grammarly lol).
I am using version 1.21 of the book and version 2.9.6 of ansible. I have a Ubuntu 18.04 Desktop and Ubuntu 18.04 Server VM setup for testing.
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Errata: Page 8, "ansible example -a "free -m" -u [username]" commandMar 18, 2020