"$d_Syint""Linux/time program usage, resources notes.txt"
www.BillHowell.ca  13Jul2021


man time 
NAME
       time - run programs and summarize system resource usage

SYNOPSIS
       time   [ -apqvV ] [ -f FORMAT ] [ -o FILE ]
              [ --append ] [ --verbose ] [ --quiet ] [ --portability ]
              [ --format=FORMAT ] [ --output=FILE ] [ --version ]
              [ --help ] COMMAND [ ARGS ]

DESCRIPTION
       time run the program COMMAND with any given arguments ARG....  When COMMAND finishes, time displays
       information about resources used by COMMAND (on the standard error output, by default).  If COMMAND exits
       with non-zero status, time displays a warning message and the exit status.

       time determines which information to display about the resources used by the COMMAND from the string FORMAT.
       If no format is specified on the command line, but the TIME environment variable is set, its value is used
       as the format.  Otherwise, a default format built into time is used.

       Options to time must appear on the command line before COMMAND.  Anything on the command line after COMMAND
       is passed as arguments to COMMAND.

OPTIONS
       -o FILE, --output=FILE
              Write the resource use statistics to FILE instead of to the standard error stream.  By default, this
              overwrites the file, destroying the file's previous contents.  This option is useful for collecting
              information on interactive programs and programs that produce output on the standard error stream.

       -a, --append
              Append the resource use information to the output file instead of overwriting it.  This option is
              only useful with the `-o' or `--output' option.

       -f FORMAT, --format FORMAT
              Use FORMAT as the format string that controls the output of time.  See the below more information.

       --help Print a summary of the command line options and exit.

       -p, --portability
              Use the following format string, for conformance with POSIX standard 1003.2:
                        real %e
                        user %U
                        sys %S

       -v, --verbose
              Use the built-in verbose format, which displays each available piece of information on the program's
              resource use on its own line, with an English description of its meaning.

       --quiet
              Do not report the status of the program even if it is different from zero.

       -V, --version
              Print the version number of time and exit.


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