Merge bitcoin/bitcoin#33451: doc: Add INSTALL.md to Linux release tarballs

d62f46eed4 doc: Add `INSTALL.md` to Linux release tarballs (Hennadii Stepanov)

Pull request description:

  Closes https://github.com/bitcoin/bitcoin/issues/32097:
  > Better I think would be to add instructions for the most popular desktop distros.

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Tree-SHA512: eab6904b6acc63eaf0e13112f52d856ee630ce4110fb368f4f5f170655def91706bb7c7f70c123186a51461ea3d48ef026a4e026d665675f1fd76f2d0bbca68c

contrib/guix/libexec/build.sh

@@ -309,6 +309,7 @@ mkdir -p "$DISTSRC"
                 ;;
             *linux*)
                 cp "${DISTSRC}/README.md" "${DISTNAME}/"
+                cp "${DISTSRC}/doc/INSTALL_linux.md" "${DISTNAME}/INSTALL.md"
                 ;;
         esac
 

doc/INSTALL_linux.md

@@ -0,0 +1,29 @@
+Bitcoin Core
+=============
+
+Below are notes on installing Bitcoin Core software on Linux systems.
+
+General Runtime Requirements
+----------------------------
+
+Bitcoin Core requires glibc (GNU C Library) 2.31 or newer.
+
+GUI Runtime Requirements
+------------------------
+
+The GUI executable, `bitcoin-qt`, is based on the Qt 6 framework and uses the `xcb` QPA (Qt Platform Abstraction) platform plugin
+to run on X11. Its runtime library dependencies are as follows:
+- `libfontconfig`
+- `libfreetype`
+
+On Debian, Ubuntu, or their derivatives, you can run the following command to ensure all dependencies are installed:
+```sh
+sudo apt install libfontconfig1 libfreetype6
+```
+
+On Fedora, run:
+```sh
+sudo dnf install fontconfig freetype
+```
+
+For other systems, please consult their documentation.