Today, sar, it seems is not part of the Debian distros, one needs to install the package sysstat.
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Raspian & APT
This snip was originally created to document the arse-ache I had building my second Pi; it documented problems with Jesse & Stretch. The current release is Buster and so much of this content is deprecated. I amended this in Dec 2025 and in April 2020. I have moved deprecated content to the comments and updated…
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