(Docs) 111-mtr: Adding a content (#1881)

* docs(111-mtr): adding a content

* docs(111-mtr): add free content

* Update content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/111-mtr.md

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

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/111-mtr.md

@@ -1 +1,10 @@
-# Mtr
+# mtr
+
+`mtr` combines the functionality of the traceroute and ping programs in a single network diagnostic tool.
+
+As `mtr` starts, it investigates the network connection between the host `mtr` runs on and `HOSTNAME` by sending packets with purposely low TTLs. It continues sending packets with low TTL, noting the response time of the intervening routers. This allows `mtr` to print the internet route's response percentage and response times to HOSTNAME. A sudden packet loss or response time increase often indicates a bad (or simply overloaded) link.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.javatpoint.com/linux-mtr'>Javatpoint: Linux mtr Command</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.tutorialspoint.com/unix_commands/mtr.htm'>mtr Linux command</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.devopsroles.com/how-to-traceroute-use-mtr-command-in-linux/'>How to traceroute use mtr command in Linux</BadgeLink>