Add content for netstat command (#1863)

* Update 114-netstat.md

* Update content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/114-netstat.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/114-netstat.md

@@ -1 +1,8 @@
-# Netstat
+# netstat
+
+Netstat is a command line utility to display all the network connections on a system. It displays all the tcp, udp and unix socket connections. Apart from connected sockets it also displays listening sockets that are waiting for incoming connections. 
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.tutorialspoint.com/unix_commands/netstat.htm'>netstat command in Linux with Examples</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='http://www.c-jump.com/CIS24/Slides/Networking/html_utils/netstat.html'>Netstat Tutorial</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=bxFwpm4IobU'>Netstat Commands - Network Administration Tutorial</BadgeLink>