Added information about du command (#2414)

* Added information about du command

* Fix minor errors

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/140-du.md

@@ -1 +1,15 @@
 # Du
+
+The du (**D**isk **U**sage) command is used to retrieve information about disk space usage information in a specified directory.
+
+the basic syntax of the command is the following:
+`du <directory name>` or `du`
+
+Usage Example:
+`du /home/nirzak`
+
+It can be used with various flags to customize the outputs. See the man page of this command for more options `man du`
+
+<ResourceGroupTitle>Useful Links</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Man page' href='https://man7.org/linux/man-pages/man1/du.1.html'>du man page</BadgeLink>
+<BadgeLink colorScheme='blue' badgeText='Tutorial' href='https://linuxhint.com/linux-du-command-examples/'>Du command with examples</BadgeLink>