ac: GNU Accounting Utilities (release 6.6.4)

Usage: ac [OPTION] ... OPTIONS: -d, --daily-totals Print totals for each day -p, --individual-totals Print time totals for each user -f, --file <file> Read from <file> --complain Print errors for whatever problem --reboots Count the time between login and reboot --supplants Count the time between logins on the terminal --timewarps Count the time between login and time warp --compatibility Shortcut for --reboots --supplants --timewarps -a, --all-days Do not skip days without login activity --tw-leniency <value> Set the time warp leniency <value> in seconds --tw-suspicious <value> Set the time warp suspicious <value> in seconds --print-year Print year when displaying dates --print-zeros Don't suppress zeros in category totals --debug Print verbose internal information -V, --version Show version and exit -h, --help Show help and exit The system's default login accounting file is /var/log/wtmp.