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Test Your Knowledge in Computers #592
Difficulty: Medium
Suppose we want to sort a huge collection of 1 trillion, 10^12, elements. Doing so with Selection Sort or Insertion Sort would require about n^2 = (10^12)^2 = 10^24 or 1 sextillion comparisons.
True or False?
Linux & Unix Commands - Search Man Pages

achfile(1) [redhat man page]

ACHFILE(1)						      General Commands Manual							ACHFILE(1)

NAME
achfile - change type and/or creator of Apple Macintosh files (netatalk format) SYNOPSIS
achfile [ -t type ] [ -c creator ] file ... DESCRIPTION
achfile changes the Macintosh type and/or creator of the file arguments which have a corresponding .AppleDouble file. OPTIONS
-t type change the type. -c creator change the creator. DIAGNOSTICS
returns exit status 0 if all files changed successfully SEE ALSO
afile(1), afpd(1) 26 Feb 1998 ACHFILE(1)

Check Out this Related Man Page

AFILE(1)						      General Commands Manual							  AFILE(1)

NAME
afile - display type and creator of Apple Macintosh files (netatalk format) SYNOPSIS
afile [ -a ] file ... DESCRIPTION
afile displays the name and Macintosh type and creator of the file arguments. Tests whether the file is an AppleDouble header, in which case it checks the corresponding data fork exists, or assumes it is a data fork in which case it looks for the corresponding AppleDouble to find the type/creator information. afile does not look at any of the extension mapping files such as AppleVolumes.system. OPTIONS
-a Include directories and data files of unknown type (i.e. without corresponding AppleDouble) in output. DIAGNOSTICS
returns exit status 0 if all files have a corresponding valid .AppleDouble header or data fork, or 99 for bad command line options. Other- wise it returns the following error code relating to the last invalid file. 1 file doesn't exist 2 file is unreadable 3 file is directory 4 file is AppleDouble without data fork 5 file is AppleDouble with unreadable data fork 6 file is data fork without AppleDouble 7 file is data fork with unreadable AppleDouble 8 file is data fork with short AppleDouble 9 bad magic in AppleDouble SEE ALSO
achfile(1), afpd(1) 26 Feb 1998 AFILE(1)

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