-j8 in linux_installation tutorial

diff --git a/doc/tutorials/introduction/linux_install/linux_install.rst b/doc/tutorials/introduction/linux_install/linux_install.rst
index 26b243f..d31c68a 100644 (file)
--- a/doc/tutorials/introduction/linux_install/linux_install.rst
+++ b/doc/tutorials/introduction/linux_install/linux_install.rst
@@ -74,7 +74,8 @@ Building OpenCV from Source Using CMake, Using the Command Line
 
    .. code-block:: bash
 
-      make
+      make -j8 # -j8 runs 8 jobs in parallel.
+               # Change 8 to number of hardware threads available.
       sudo make install
 
 .. note::