File
attributes describe files in specific ways. For example, the read-only attribute
defines a file that can’t be written—only read. Directories use a special
directory attribute that sets them apart from files. The Dir / AAttribute Filename
command, where Attribute is the attribute you want to search for, helps
you locate specific kinds of files.
Now that you have some idea of how to
find files using an attribute, it’s time to look at the available attributes.
The following list describes each of the standard attributes:
·
/AA:
Locates files that are ready for archiving.
·
/AH:
Locates hidden files (these are sometimes visible within
Windows Explorer without any special setup).
·
/AI:
Displays files that aren’t indexed for use in Windows Search.
·
/AL:
Displays file entries that include reparse points. A reparse point is
special data associated with the file that defines it in a special way using
custom data that’s managed by a filter (such as the properties set on a Word
document that you see on the Details tab of the file’s Properties dialog box).
You can read about reparse points at http://msdn.microsoft.com/library/aa365503.aspx.
·
/AR:
Locates read-only files.
·
/AS:
Locates system files.
·
/A–Attribute:
A prefix used to negate a standard attribute. For example, if you want to find
all entries except for directories, you type Dir /A–D and press Enter.
The
attributes are important for another reason. The Dir command won’t display
hidden files unless you add the /AH switch. Consequently, you might not even
see some files without using an attribute switch. You can combine switches to
obtain specific effects. For example, the hidden and system switches are
commonly used together for operating system files. If you want to find just the
operating system files on a hard drive, you can type Dir *.* /AH /AS /S and
press Enter.
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