Print how long a particular user has been connected in hours per day (with total)

Print statistics on how long users have been connected.
More information: <https://www.gnu.org/software/acct/manual/accounting.html#ac>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

ac --daily-totals --individual-totals {{username}}

click the source code to copy install ac on any operating system with command-not-found.com