Add screen multiplexer

Screen documentation

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/100-screen-multiplexer.md

@@ -1 +1,8 @@
-# Screen Multiplexer
+# Screen
+
+Screen  is  a  full-screen  window manager that multiplexes a physical terminal between several processes (typically interactive shells). Each virtual terminal provides the functions of a DEC VT100 terminal and, in addition, several control functions from the ISO 6429 (ECMA 48, ANSI X3.64) and ISO 2022 standards (e.g. insert/delete line and support for multiple character sets). There is  a  scrollback  history buffer for each virtual terminal and a copy-and-paste mechanism that allows moving text regions between windows.
+
+See `man screen` or `screen -h` for further information
+
+<BadgeLink badgeText='Cheat Sheet' colorScheme='blue' href='https://kapeli.com/cheat_sheets/screen.docset/Contents/Resources/Documents/index'>Screen Cheat Sheet</BadgeLink>
+<BadgeLink badgeText='User Manual' colorScheme='blue' href='https://www.gnu.org/software/screen/manual/screen.html'>Screen User's Manual</BadgeLink>