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+'\" Copyright (C) 1998-2022 Free Software Foundation, Inc.
+'\"
+'\" This is free software.  You may redistribute copies of it under the terms
+'\" of the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.
+'\" There is NO WARRANTY, to the extent permitted by law.
+[NAME]
+du \- estimate file space usage
+[DESCRIPTION]
+.\" Add any additional description here
+[PATTERNS]
+PATTERN is a shell pattern (not a regular expression).  The pattern
+.B ?\&
+matches any one character, whereas
+.B *
+matches any string (composed of zero, one or multiple characters).  For
+example,
+.B *.o
+will match any files whose names end in
+.BR .o .
+Therefore, the command
+.IP
+.B du \-\-exclude=\(aq*.o\(aq
+.PP
+will skip all files and subdirectories ending in
+.B .o
+(including the file
+.B .o
+itself).