LSCLOCKS(1) User Commands LSCLOCKS(1) (NAME) lsclocks - (SYNOPSIS) lsclocks [option] (DESCRIPTION) lsclocks . . . o POSIX: CLOCK_MONOTONIC CLOCK_REALTIME CLOCK_BOOTTIME . o : clock_getcpuclockid(3). o PTP: /dev/ptp0. o RTC: /dev/rtc0. o (Auxiliary): CLOCK_AUX0 CLOCK_AUX1 . (OPTIONS) -J, --json JSON. -n, --noheadings . -o, --output list . (OUTPUT COLUMNS) . --output-all . -r, --raw (raw). -t, --time clock . --no-discover-dynamic . -d, --dynamic-clock path . . --no-discover-rtc RTC. -x, --rtc path RTC . . -c, --cpu-clock pid . . -h, --help . -V, --version . (ENVIRONMENT) LSCLOCKS_COLUMNS= . (OUTPUT COLUMNS) . LIBSMARTCOLS_DEBUG=all libsmartcols . LIBSMARTCOLS_DEBUG_PADDING=on . LIBSMARTCOLS_JSON=compact|lines JSON --json . compact JSON lines JSON Lines ( JSON ). JSON (pretty-printed) . (OUTPUT COLUMNS) . < > . TYPE . ID . CLOCK CLOCK_. NAME . TIME clock_gettime(2) . ISO_TIME TIME ISO8601. RESOL_RAW clock_getres(2) . RESOL RESOL_RAW. REL_TIME TIME . NS_OFFSET () /proc/self/timens_offsets. (AUTHORS) Thomas Weissschuh (SEE ALSO) clock_getres(2) clock_gettime(2) (REPORTING BUGS) . (AVAILABILITY) lsclocks util-linux . . util-linux 2.42.3 2026-09-02 LSCLOCKS(1)