|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|
|
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | OUTPUT COLUMNS | AUTHORS | SEE ALSO | REPORTING BUGS | AVAILABILITY |
|
|
|
LSCLOCKS(1) User Commands LSCLOCKS(1)
lsclocks - display system clocks
lsclocks [option]
lsclocks is a simple command to display system clocks.
It allows to display information like current time and resolution
of clocks. Different kinds of clocks are supported.
• POSIX clocks: CLOCK_MONOTONIC, CLOCK_REALTIME, CLOCK_BOOTTIME,
etc.
• CPU clocks: clock_getcpuclockid().
• PTP clocks: /dev/ptp0.
• RTC clocks: /dev/rtc0.
-J, --json
Use JSON output format.
-n, --noheadings
Don’t print headings.
-o, --output list
Specify which output columns to print. See the OUTPUT COLUMNS
section for details of available columns.
--output-all
Output all columns.
-r, --raw
Use raw output format.
-t, --time clock
Show current time of one specific clock.
--no-discover-dynamic
Do not try to discover dynamic clocks.
-d, --dynamic-clock path
Also display specified dynamic clock. Can be specified
multiple times.
--no-discover-rtc
Do not try to discover RTCs.
-x, --rtc path
Also display specified RTC. Can be specified multiple times.
-c, --cpu-clock pid
Also display CPU clock of specified process. Can be specified
multiple times.
-h, --help
Display help text and exit.
-V, --version
Display version and exit.
Each column has a type. Types are surround by < and >.
TYPE <string>
Clock type.
ID <number>
Numeric clock ID.
CLOCK <string>
Name in the form CLOCK_
NAME <string>
Shorter, easier to read name.
TIME <number>
Current clock timestamp as returned by clock_gettime().
ISO_TIME <string>
ISO8601 formatted version of TIME.
RESOL_RAW <number>
Clock resolution as returned by clock_getres(2).
RESOL <number>
Human readable version of RESOL_RAW.
REL_TIME <string>
TIME time formatted as time range.
NS_OFFSET <number>
Offset of the current namespace to the parent namespace as
read from /proc/self/timens_offsets.
Thomas Weißschuh <thomas@t-8ch.de>
clock_getres(2) clock_gettime(2)
For bug reports, use the issue tracker
<https://github.com/util-linux/util-linux/issues>.
The lsclocks command is part of the util-linux package which can
be downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>. This page is
part of the util-linux (a random collection of Linux utilities)
project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2025-08-11. (At that time, the date of the most recent commit that
was found in the repository was 2025-08-05.) If you discover any
rendering problems in this HTML version of the page, or you
believe there is a better or more up-to-date source for the page,
or you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a
mail to man-pages@man7.org
util-linux 2.42-start-521-ec46 2025-08-09 LSCLOCKS(1)
|
HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
|