Merge pull request #18195 from mshabunin:linux-tutorial

Installation tutorials rework

* Doc: general installation, config reference, linux installation

* Doc: addressed review comments

* Minor fixes

samples/install/linux_install_a.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+# This file contains documentation snippets for Linux installation tutorial
+if [ "$1" = "--check" ] ; then
+sudo()
+{
+    command $@
+}
+fi
+
+sudo apt update
+
+# [gcc]
+sudo apt install -y g++
+# [gcc]
+
+# [make]
+sudo apt install -y make
+# [make]
+
+# [cmake]
+sudo apt install -y cmake
+# [cmake]
+
+# [wget]
+sudo apt install -y wget unzip
+# [wget]
+
+# [download]
+wget -O opencv.zip https://github.com/opencv/opencv/archive/master.zip
+unzip opencv.zip
+mv opencv-master opencv
+# [download]
+
+# [prepare]
+mkdir -p build && cd build
+# [prepare]
+
+# [configure]
+cmake ../opencv
+# [configure]
+
+# [build]
+make -j4
+# [build]
+
+# [check]
+ls bin
+ls lib
+# [check]
+
+# [check cmake]
+ls OpenCVConfig*.cmake
+ls OpenCVModules.cmake
+# [check cmake]
+
+# [install]
+sudo make install
+# [install]