Correct UNIX dev year, current openSUSE version.

Author: V-Z

presentation/linux_bash_metacentrum_course.tex

@@ -155,7 +155,7 @@ \subsection{Learning machine}
 	\begin{multicols}{2}
 		\begin{itemize}
 			\item If you do not have Linux installed, download and install VirtualBox from \url{https://www.virtualbox.org/}
-			\item Download openSUSE Leap 15.0 Linux distribution for this course from \url{ftp://botany.natur.cuni.cz/openSUSE_Leap_courses.ova} ($\sim$5~GB)
+			\item Download openSUSE Leap 15.2 Linux distribution for this course from \url{ftp://botany.natur.cuni.cz/openSUSE_Leap_courses.ova} ($\sim$5~GB)
 			\item Launch VirtualBox and go to menu \textbf{File | Import appliance\ldots} to import it. When done, launch it (\textbf{Start})
 		\end{itemize}
 		\includegraphics[height=6cm]{virtualbox.png}
@@ -191,7 +191,7 @@ \subsection{What it is a~\enquote{UNIX}}
 	\begin{itemize}
 		\item \href{https://en.wikipedia.org/wiki/Unix}{UNIX}
 		\begin{itemize}
-			\item Originally developed in Bell labs of AT\&T in 1696, written in C, since then  huge radiation, hybridization, HGT,~\ldots
+			\item Originally developed in Bell labs of AT\&T in 1969, written in C, since then  huge radiation, hybridization, HGT,~\ldots
 			\item Trademark --- only systems passing certain conditions (paid certification) can be called \enquote{UNIX} --- Solaris, HP-UX, AIX, etc. (commercial systems for big servers)
 			\item Main principles: simple, multitasking, hierarchical, network, for more users (takes cares about permissions etc.), configuration written in plain text files, important relationships among applications (generally one application = one task --- they are chained), work primarily with text, has kernel and API (interface to communicate with the rest of the system)
 			\item \href{https://en.wikipedia.org/wiki/Unix-like}{UNIX-like} (UN*X, *nix)