tldr/pages/linux/ac.md

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# ac
> Print statistics on how long users have been connected.
> More information: <https://www.gnu.org/software/acct/manual/accounting.html#ac>.
- Print how long the current user has been connected in hours:
`ac`
- Print how long users have been connected in hours:
`ac --individual-totals`
- Print how long a particular user has been connected in hours:
`ac --individual-totals {{username}}`
- Print how long a particular user has been connected in hours per day (with total):
`ac --daily-totals --individual-totals {{username}}`
- Also display additional details:
`ac --compatibility`