DOKK / manpages / debian 11 / ntpsec / ntptime.8.en
NTPTIME(8) NTPsec NTPTIME(8)

ntptime - read and set kernel time variables

ntptime [-chr] [-e est_error] [-f frequency] [-j]


        [-m max_error] [-o offset] [-s status]


        [-t time_constant]

Checks the kernel configuration for the NTP user interface syscalls ntp_gettime() and ntp_adjtime(). If present, the current timekeeping data are displayed. If not, a disappointment is displayed. See the kernel page file in the HTML documentation in distribution for further details.

A similar display can be obtained using the ntpq program and kerninfo command.

This program is useful only with kernels featuring the ntp_adjtime(2) system call or local equivalent, as described in the A <kern.html> Kernel Model for Precision Timekeeping" page,

-c

Display the execution time of ntptime itself.

-e est_error

Specify estimated error, in microseconds.

-f frequency

Specify frequency offset, in parts per million.

-h

Display help information.

-j

Report in JSON rather than plain text.

-m max_error

Specify max possible errors, in microseconds.

-o offset

Specify clock offset, in microseconds.

-r

Display Unix and NTP times in raw format.

-s status

Specify clock status. Better know what you are doing.

-t time_constant

Specify time constant, an integer in the range 0-10.

-V

Print the version string and exit.

The format for modes and status in the JSON report is less than ideal.

One of the following exit values will be returned:

0 (EXIT_SUCCESS)

Successful program execution.

1 (EXIT_FAILURE)

The operation failed or the command invocation was not valid.
2021-06-17 NTPsec