By default, `time' writes the resource use statistics to the
standard error stream. The options below make it write the statistics
to a file instead. Doing this can be useful if the program you're
running writes to the standard error or you're running `time'
noninteractively or in the background.
Write the resource use statistics to FILE. By default, this
_overwrites_ the file, destroying the file's previous contents.
_Append_ the resource use information to the output file instead
of overwriting it. This option is only useful with the `-o' or
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