NTPSWEEP

Section: NTPsec (1)
Updated: 2021-02-01
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NAME

ntpsweep - print various information about given NTP servers

SYNOPSIS

ntpsweep [-V | --version] [-l host]... [-p] [-m number] [-s prefix] [-h string] [hostfile...]

DESCRIPTION

ntpsweep prints per host the NTP stratum level, the clock offset in seconds, the daemon version, the operating system and the processor. Optionally recursing through all peers.

If no hosts are specified, ntpsweep reports on localhost.

ntpsweep relies on ntpq and Mode 6 queries to probe servers. This depends on the remote host's restrict configuration allowing queries. Nowadays effectively all public hosts set noquery, so this script is unlikely to be useful unless you have multiple specially- configured timeservers on a LAN.

OPTIONS

-l string, --host-list=string

: Host to execute actions on. This option may appear an unlimited number of times.
Use this option to specify the host on which this script operates. May appear multiple times. Multiple hosts may be specified, delimited by commas.

-p, --peers

: Recursively list all peers a host synchronizes to.

-m number, --maxlevel=number

: Traverse peers up to this level (4 is a reasonable number). This option takes an integer number as its argument.

-s string, --strip=string

: Strip this string from hostnames.

-h string, --host=string

: Specify a single host. Deprecated option for backwards compatibility.

-V, --version

: Print the version string and exit.

If hostfiles are specified, they are treated as lists of hostnames to be swept, one per line.

EXIT STATUS

One of the following exit values will be returned:

0 (EXIT_SUCCESS)

: Successful program execution.

1 (EXIT_FAILURE)

: The operation failed or the command syntax was not valid.