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diff --git a/csh.login b/csh.login
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index e4b1990..18c5136 100644
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--- a/csh.login
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+++ b/csh.login
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@@ -23,6 +23,7 @@ else
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 			breaksw
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 		endsw
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 	end
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+	unset p
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 endif
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 setenv HOSTNAME `/usr/bin/hostname`