Docs>Install or build>Install>Linux: Add instructions for the self-contained installer for Linux

hugo/content/installation/install/linux/index.md

@@ -7,6 +7,37 @@ weight = 30
 
 BornAgain is available as a Debian/Ubuntu package at https://tracker.debian.org/pkg/bornagain.
 
+A self-contained binary installer is also produced for the major Linux distributions
+and their derivatives (like Debian, Ubuntu, ArchLinux, Manjaro, Fedora) and can be
+downloaded as a GitLab artifact.
+The installer includes all the libraries required for BornAgain, its Python package ('wheel'),
+plus additional libraries and plugins for the GUI. Note that the GUI is known to work on the
+[X11 graphics platform](https://en.wikipedia.org/wiki/X_Window_System), but Wayland is not
+tested yet; if you are using a Wayland platform, please let us know about your experience
+with BornAgain.
+
+The installer is self-extracting and does _not_ need any root permissions.
+
+The installer (e.g., `BornAgain-1.19.79-Linux.sh`) can be used as follows
+(here, installation root path is chosen to be `/tmp/ba`):
+```
+$ chmod +x BornAgain-1.19.79-Linux.sh  # permit execution
+$ ba_path='/tmp/ba'
+$ mkdir $ba_path  # make a deliberate installation path
+$ ./BornAgain-1.19.79-Linux.sh --exclude-subdir --skip-license --prefix=$ba_path
+```
+and then, the GUI can be executed:
+```
+$ cd $ba_path
+$ ./bin/bornagain
+```
+
+The installer provides also a small help for its options; use the following to obtain
+a description of the available options:
+```
+$ BornAgain-1.19.79-Linux.sh --help
+```
+
 For other distributions, see [build instructions]({{% relref "installation/building/unix" %}}).
 
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