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-rw-r--r--doc/coreutils.texi4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi
index a759448a3..a945cc340 100644
--- a/doc/coreutils.texi
+++ b/doc/coreutils.texi
@@ -3228,6 +3228,10 @@ The input need not be sorted, but duplicate input lines are detected
only if they are adjacent. If you want to discard non-adjacent
duplicate lines, perhaps you want to use @code{sort -u}.
+@vindex LC_COLLATE
+Comparisons use the character collating sequence specified by the
+@env{LC_COLLATE} locale category.
+
If no @var{output} file is specified, @command{uniq} writes to standard
output.