ts - timestamp input

       Copyright 2006 by Joey Hess <id@joeyh.name>

       Licensed under the GNU GPL.

moreutils                                          2024-02-25                                              TS(1)

       ts adds a timestamp to the beginning of each line of input.

       The optional format parameter controls how the timestamp is formatted, as used by strftime(3). The
       default format is "%b %d %H:%M:%S". In addition to the regular strftime conversion specifications, "%.S"
       and "%.s" and "%.T" are like "%S" and "%s" and "%T", but provide subsecond resolution (ie, "30.00001" and
       "1301682593.00001" and "1:15:30.00001").

       If the -r switch is passed, it instead converts existing timestamps in the input to relative times, such
       as "15m5s ago". Many common timestamp formats are supported. Note that the Time::Duration and Date::Parse
       perl modules are required for this mode to work. Currently, converting localized dates is not supported.

       If both -r and a format is passed, the existing timestamps are converted to the specified format.

       If the -i or -s switch is passed, ts reports incremental timestamps instead of absolute ones. The default
       format changes to "%H:%M:%S", and "%.S" and "%.s" can be used as well. In case of -i, every timestamp
       will be the time elapsed since the last timestamp. In case of -s, the time elapsed since start of the
       program is used.

       The -m switch makes the system's monotonic clock be used.

       The standard TZ environment variable controls what time zone dates are assumed to be in, if a timezone is
       not specified as part of the date.

       ts - timestamp input

       ts [-r] [-i | -s] [-m] [format]