some minors update

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@@ -87,7 +87,7 @@ <h3>
 	    to do research in computational physics/astrophysics/data science and everything else. The majority of packages are
 	    handled as <a href="https://wiki.archlinux.org/index.php/PKGBUILD#Dependencies">dependencies</a>:, I do like to
 	    maintain a minimum list/system, and if you don't use an arch-based system I would recommend you to see this
-	    explicitly software package <a href="https://rvlobato.github.io/teaching/#computation">list</a> instead.</p>
+	    explicitly software package <a href="https://rvlobato.github.io/teaching/#computation">list</a> instead. I also have been using <a href="gentoo.org/">Gentoo</a>, a highly flexible, source-based Linux distribution. Since it appeals to Linux users who want full control of the software that is installed and running on their computedd it requires time to configure and tune, so I recomend Arch as an out-of-the-box experience.</p>
 
 	  <p> I like history of natural sciences, how the development went from ancient times to present, and also scientific genealogy (in special <a href="https://academictree.org/physics/">physics</a> and <a href="https://genealogy.math.ndsu.nodak.edu/">mathematics</a>).</p>
 
@@ -159,14 +159,11 @@ <h3>
 		    third-party, leaving the power of privacy and
 		    freedom in the hands of users. I highly recomend this distributed (C) service, since there are multiple pathways for
 		    communication, the loss of any participant/internet will
-		    not prevent communication; other recomended p2p e2ee distributed (C) application is <a href="https://keet.io">Keet</a>. I also recomend <a href="https://matrix.org/blog/home/">Matrix</a>, which is an open
+		    not prevent communication; other highly recomended p2p e2ee distributed (C) application is <a href="https://keet.io">Keet</a>. I also recomend <a href="https://matrix.org/blog/home/">Matrix</a>, which is an open
 			network for secure (e2ee) and decentralized (B)
 			communication; to connect to the Matrix federation, you will use a <a
 				href="https://matrix.org/clients-matrix/">client</a>, one of the most popular is <a
-				href="https://element.io/">element</a>. Other decentralized service (B) that I recommended is <a href="https://getsession.org/">Session</a>, this secure (e2ee) service uses
-			the onion-routed
-			decentralized <a href="https://oxen.io/">Oxen Service Node Network</a>/<a href="https://lokinet.org/">Lokinet</a>.
-			You
+				href="https://element.io/">element</a>.	You
 			can also use <a href="https://signal.org/">Signal</a>,
 			however this is a centralized (A)
 			service (e2ee), is susceptible to outages or policy/ownership which can change easily, also it needs a cellphone