Improve installation instructions

README.rst

@@ -51,8 +51,9 @@ Hindu goddess of knowledge, music, art, wisdom and learning.
 Status
 ======
 
-The software was tested successfully with Python 3.7-3.9, GStreamer 1.10.4, 1.14.4,
-and 1.18.4, on both Linux and macOS.
+The software was tested successfully with Python 3.7-3.9, GStreamer 1.10.4,
+1.14.4, 1.16.2 and 1.18.4, on both Linux (Debian 10.x buster, Linux Mint 20.2)
+and macOS (Catalina 10.15.7).
 
 THIS IS A WORK IN PROGRESS. THERE MIGHT BE DRAGONS. YOU HAVE BEEN WARNED.
 
@@ -76,11 +77,11 @@ Debian-based systems
 --------------------
 ::
 
-    apt-get update
-    apt-get install --yes libgstreamer1.0 gstreamer1.0-tools gstreamer1.0-alsa gstreamer1.0-plugins-base gstreamer1.0-plugins-good
-    apt-get install --yes python3 python3-pip python3-gst-1.0 python3-gi python3-tz
-    apt-get install --yes alsa-utils mkvtoolnix
-    pip3 install saraswati --upgrade
+    sudo apt-get update
+    sudo apt-get install --yes libgstreamer1.0 gstreamer1.0-tools gstreamer1.0-alsa gstreamer1.0-plugins-base gstreamer1.0-plugins-good
+    sudo apt-get install --yes python3 python3-pip python3-gst-1.0 python3-gi python3-tz
+    sudo apt-get install --yes alsa-utils mkvtoolnix
+    sudo pip3 install saraswati --upgrade
 
 macOS systems
 -------------
@@ -94,7 +95,7 @@ Configure system
 
 Synchronize system time with NTP, this is important for appropriate timestamping::
 
-    timedatectl set-ntp true
+    sudo timedatectl set-ntp true
 
 
 Install Saraswati