diff --git a/NEWS.md b/NEWS.md
index 635e8a1d..dc8ed035 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,74 @@
+## Version 28 ("Alpine Hike")
+### Dec 12th, 2020
+
+#### FIXES
+
+A few Clang and GCC warnings have been fixed.
+
+#### ENHANCEMENTS
+
+##### Plugin check_pressure
+
+New plugin `check_pressure` that reports the Linux Pressure Stall Information (PSI) exported by Linux kernels 4.20+ (in the `/proc/pressure/` folder).
+
+    check_pressure --cpu      return the cpu pressure metrics
+    check_pressure --io       return the io (block layer/filesystems) pressure metrics
+    check_pressure --memory   return the memory pressure metrics
+
+##### Build system
+
+Here are some notable news:
+
+ * Integrate *Nagios Plugins for Linux* with *GitHub Workflow* tests;
+ * Add [Linux Alpine](https://alpinelinux.org/) and [Ubuntu](https://ubuntu.com/)
+   to the list of supported and automatically tested Linux distributions;
+ * Update the list of supported platforms by adding Alpine 3.12 and Fedora 33;
+ * Make the `packages/docker-shell-helpers` folder a git submodule.
+
+##### Package creation
+
+Create also the native package for Alpine 3.12.
+
+### GIT DIFF
+```
+$ git diff --stat bef83bc ee0fbd5
+ .github/ISSUE_TEMPLATE/bug_report.md                  |  17 +++++-----
+ .github/ISSUE_TEMPLATE/feature_request.md             |  22 +++++++++++++
+ .github/workflows/build-checks.yml                    |  59 ++++++++++++++++++++++++++++++++++
+ .gitmodules                                           |   3 ++
+ NEWS.md                                               | 230 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------------------------------------
+ README.md                                             |  69 ++++++++++++++++++++++++----------------
+ configure.ac                                          |  14 ++++++++
+ include/Makefile.am                                   |   1 +
+ include/pressure.h                                    |  85 +++++++++++++++++++++++++++++++++++++++++++++++++
+ include/system.h                                      |   3 --
+ include/testutils.h                                   |   2 ++
+ lib/Makefile.am                                       |   1 +
+ lib/netinfo-private.c                                 |   4 +--
+ lib/pressure.c                                        | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ lib/processes.c                                       |   4 +++
+ packages/Makefile.am                                  |  28 ++++++++++------
+ packages/docker-shell-helpers                         |   1 +
+ packages/docker-shell-helpers/LICENSE                 | 201 ------------------------------------------------------------------------------------------------------------------
+ packages/docker-shell-helpers/README.md               |  74 ------------------------------------------
+ packages/docker-shell-helpers/__generate-doc.sh       |  26 ---------------
+ packages/docker-shell-helpers/docker-shell-helpers.sh | 183 --------------------------------------------------------------------------------------------------------
+ packages/docker-shell-helpers/images/docker.png       | Bin 28288 -> 0 bytes
+ packages/multibuild.sh                                |  51 +++++++++++++++++++++++++----
+ packages/specs/APKBUILD.in                            |  44 +++++++++++++++++++++++++
+ packages/specs/Makefile.am                            |   2 +-
+ plugins/Makefile.am                                   |   2 ++
+ plugins/check_multipath.c                             |   1 +
+ plugins/check_network.c                               |   2 +-
+ plugins/check_pressure.c                              | 230 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ tests/Makefile.am                                     |   6 ++++
+ tests/ts_procpressurecpu.data                         |   1 +
+ tests/ts_procpressureio.data                          |   2 ++
+ tests/tslib_uname.c                                   |  14 ++++++++
+ tests/tslibpressure.c                                 | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 34 files changed, 1046 insertions(+), 659 deletions(-)
+```
+
 ## Version 27 ("Polish Landscapes")
 ### Aug 8th, 2020
 
diff --git a/README.md b/README.md
index 625c8c9e..1185c7a0 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 ![Release Status](https://img.shields.io/badge/status-stable-brightgreen.svg)
 [![License](https://img.shields.io/badge/License-GPL--3.0-blue.svg)](https://spdx.org/licenses/GPL-3.0.html)
-[![Download Latest Release](https://img.shields.io/badge/download-latest--tarball-blue.svg)](https://github.com/madrisan/nagios-plugins-linux/releases/download/v27/nagios-plugins-linux-27.tar.xz)
+[![Download Latest Release](https://img.shields.io/badge/download-latest--tarball-blue.svg)](https://github.com/madrisan/nagios-plugins-linux/releases/download/v28/nagios-plugins-linux-28.tar.xz)
 [![Say Thanks!](https://img.shields.io/badge/Say%20Thanks-!-1EAEDB.svg)](https://saythanks.io/to/davide.madrisan@gmail.com)
 
 [![Build Status](https://travis-ci.org/madrisan/nagios-plugins-linux.svg?branch=master)](https://travis-ci.org/madrisan/nagios-plugins-linux)
diff --git a/configure.ac b/configure.ac
index 4ae88d53..b9fc4f80 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.59])
 
-AC_INIT([nagios-plugins-linux],[27],
+AC_INIT([nagios-plugins-linux],[28],
         [davide.madrisan@gmail.com])
 
 AC_CANONICAL_TARGET