Add pwd docs entry

content/general/concepts/linux/pwd/pwd.md

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+---
+Title: 'pwd'
+Description: 'Prints the current working directory.'
+Subjects:
+  - 'Computer Science'
+Tags:
+  - 'Linux'
+  - 'Unix'
+  - 'Command Line Prompts'
+CatalogContent:
+  - 'learn-the-command-line'
+  - 'paths/computer-science'
+  - 'paths/code-foundations'
+---
+
+## pwd
+
+The 'pwd' command in Linux displays the user's current working directory, showing the absolute path of the user's current location in the file system.
+
+## Other information
+- It allows the user to quickly identify their location in the file system.
+- The evironment variable $PWD stores the path of the current working directory.
+- There are two flag commands that can accompany the 'pwd' command:
+    - The '-L' flag (Logical), which displays the logical path, including the shortcuts (symbolic links).
+      - This maintains the context of the navegation path.
+    - The '-P' flag (Physical), which skips all shortcuts and displays the actual, physical location of the directory on the hard drive.
+      - This resolves to the actual storage location.
+