time: Redirecting

 
 1.3 Redirecting Output
 ======================
 
 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.
 
 '-o FILE'
 '--output=FILE'
      Write the resource use statistics to FILE.  By default, this
      _overwrites_ the file, destroying the file's previous contents.
 
 '-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.