diff --git a/pages/common/shuf.md b/pages/common/shuf.md
index 5912275e2a..13880f4964 100644
--- a/pages/common/shuf.md
+++ b/pages/common/shuf.md
@@ -1,6 +1,7 @@
 # shuf
 
 > Generate random permutations.
+> More information: <https://www.gnu.org/software/coreutils/manual/html_node/shuf-invocation.html>.
 
 - Randomize the order of lines in a file and output the result: