diff --git a/notebook/cli.flatpak.org b/notebook/cli.flatpak.org
index 1f62449..c0fa4f8 100644
--- a/notebook/cli.flatpak.org
+++ b/notebook/cli.flatpak.org
@@ -3,7 +3,7 @@
 :END:
 #+title: Command line: Flatpak
 #+date: "2021-06-04 07:39:11 +08:00"
-#+date_modified: "2021-08-14 16:04:15 +08:00"
+#+date_modified: "2021-11-08 20:12:02 +08:00"
 #+language: en
 
 
@@ -29,8 +29,11 @@ Most of the query-related subcommands (e.g., =search=, =list=) has the following
 * Subcommands
 
 - =info PACKAGE [BRANCH]= prints related information of the package.
-  + =-M, --show-permissions= prints the permissions of the package in a INI-like format.
-  + =-m, --show-metadata= prints the metadata in a INI-like format.
+  - =-M, --show-permissions= prints the permissions of the package in a INI-like format.
+  - =-m, --show-metadata= prints the metadata in a INI-like format.
+- =remote-ls [REMOTE]= lists all of the packages of the given remote.
+  - =--app= only includes standalone applications.
+  - =--runtime= only lists runtimes.
 
 
 
diff --git a/notebook/cli.pacman.org b/notebook/cli.pacman.org
index d0251a3..f6e43a2 100644
--- a/notebook/cli.pacman.org
+++ b/notebook/cli.pacman.org
@@ -3,7 +3,7 @@
 :END:
 #+title: Command line: pacman
 #+date: "2021-06-08 15:00:04 +08:00"
-#+date_modified: "2021-11-06 12:05:11 +08:00"
+#+date_modified: "2021-11-06 12:12:06 +08:00"
 #+language: en
 #+property: header_args  :eval no
 
@@ -109,4 +109,4 @@ pacman -Q --native --quiet | fzf --multi --prompt "Remove installed package(s) >
   for example, you cannot know what files are owned by the package unless it is installed (also you have =pkgfile= for that)
 
 - pacman also cannot view the PKGBUILD of packages that are not installed;
-  you can use
+  you can use the =asp= tool for that (i.e., ~asp show ${PACKAGE}~)
diff --git a/notebook/cloud.open-build-service.org b/notebook/cloud.open-build-service.org
new file mode 100644
index 0000000..a6075fa
--- /dev/null
+++ b/notebook/cloud.open-build-service.org
@@ -0,0 +1,18 @@
+:PROPERTIES:
+:ID:       53061a97-e907-4a31-9109-a2f6c57c6e22
+:END:
+#+title: Open Build Service
+#+date: 2021-11-12 09:45:15 +08:00
+#+date_modified: 2021-11-17 13:22:28 +08:00
+#+language: en
+
+
+- a generic package builder that supports buiding packages for other distributions (e.g., [[id:f3f1201a-9fb9-4481-981f-5f50f8982a5e][Arch Linux]], Debian, roam:Fedora, FreeBSD) and architectures
+- for [[id:f3f1201a-9fb9-4481-981f-5f50f8982a5e][Arch Linux]], you can configure =pacman= to include the result;
+  for example, adding the OpenSUSE repository that outputs specifically for Arch Linux packages
+
+#+begin_src conf
+[openSUSE_Tools_Arch]
+SigLevel = Optional TrustAll
+Server = http://download.opensuse.org/repositories/openSUSE:/Tools/Arch/$arch/
+#+end_src
diff --git a/notebook/editor.neovim.lua.org b/notebook/editor.neovim.lua.org
index a224a84..a9a2a58 100644
--- a/notebook/editor.neovim.lua.org
+++ b/notebook/editor.neovim.lua.org
@@ -3,7 +3,7 @@
 :END:
 #+title: Neovim Lua integration
 #+date: "2021-07-15 07:45:50 +08:00"
-#+date_modified: "2021-07-20 23:31:52 +08:00"
+#+date_modified: "2021-11-16 19:15:13 +08:00"
 #+language: en
 
 
@@ -25,6 +25,7 @@
   + =vim.opt= will return an Option object, it has a common API;
     to learn more about it, see =vim.opt= and its subsections
   + to run Vimscript, you can use =vim.cmd= — e.g., ~vim.cmd "colorscheme nord"~
+  + interacting with Neovim API through =vim.api=
 - there are Neovim configurations written in Lua
   + [[https://github.com/mjlbach/defaults.nvim][defaults.nvim]]
 - comprehensive examples include Neovim plugins that are already written in Lua
@@ -32,3 +33,4 @@
   + [[https://github.com/wbthomason/packer.nvim][packer.nvim]] is a more comprehensive package manager
   + [[https://github.com/L3MON4D3/LuaSnip][LuaSnip]] is a snippet engine
   + [[https://github.com/nvim-telescope/telescope.nvim][telescope.nvim]] is a fuzzy finder integrated inside Neovim
+- for more information to create Lua modules, see =lua-require-example= help section
diff --git a/notebook/packages.flatpak.org b/notebook/packages.flatpak.org
index 7e6e7b8..5ec36e6 100644
--- a/notebook/packages.flatpak.org
+++ b/notebook/packages.flatpak.org
@@ -3,16 +3,38 @@
 :END:
 #+title: Flatpak packages
 #+date: "2021-06-27 23:46:41 +08:00"
-#+date_modified: "2021-11-04 16:21:45 +08:00"
+#+date_modified: "2021-11-17 13:31:30 +08:00"
 #+language: en
 
 
-- a Flatpak package usually is an application that depends on runtimes which are collections of library
-- while runtimes can be created, there are only a handful of them in the official Flathub remote
-- some of the runtimes include Freedesktop, GNOME, and KDE
+A Flatpak package usually is an application that depends on runtimes which are collections of library.
+For more information, Flatpak has a [[https://docs.flatpak.org/][documentation page]] complete with references and tutorials to get started.
+
+
+
+
+* Terminologies
+
+To get us on the same page very quickly, here's the terminologies you'll encounter when dealing with Flatpak.
+
+- *Remotes* are the repositories of packages in a similar vein to [[id:53061a97-e907-4a31-9109-a2f6c57c6e22][Open Build Service]] projects.
+
+- The *manifest* is the term for package definition which will be passed into the builder service similar to [[id:963c043e-4972-4b29-8360-223ec3465203][Nix packages]].
+
+- *Runtimes* are a bundle of libraries and applications to be shared from several packages.
+  This is how Flatpak reduces the total build size for all packages.
+  Among others, it has runtime for Freedesktop, GNOME, and KDE platforms.
+
+- *Base applications* are smaller bundles of libraries not large enough to be a runtime.
+  It enables control by adding this mini-bundle into a package.
+  This is typically specialized in scope (e.g., Electron applications).
+
+
+
+
+* Extra information
+
 - you can run the runtimes to know the installed packages (e.g., ~flatpak run org.freedesktop.Sdk//19.08~)
-- Flatpak can get packages from a repository referred to as *remotes* similar to Arch packages or FreeBSD ports
-- the package definition are referred to as a *manifest* similar to [[id:963c043e-4972-4b29-8360-223ec3465203][Nix packages]]
 - Flatpak can create bundles from a manifest, enabling easier distribution without a Flatpak remote
 - similar to [[id:963c043e-4972-4b29-8360-223ec3465203][Nix packages]] and [[id:be917383-84c4-4bf5-9ca0-b04bfb778f4f][Guix package manager]], sandboxing is an important part of the build process;
   thus, there are limitations such as no network availability, filesystem access, and socket access;