fuser: add new examples (#2513)

pages/linux/fuser.md

@@ -1,8 +1,23 @@
 # fuser
 
 > Display process IDs currently using files or sockets.
-> Require admin privileges.
 
-- Identify process using a TCP socket:
+- Find which processes are accessing a file or directory:
 
-`fuser -n tcp {{port}}`
+`fuser {{path/to/file_or_directory}}`
+
+- Show more fields (`USER`, `PID`, `ACCESS` and `COMMAND`):
+
+`fuser --verbose {{path/to/file_or_directory}}`
+
+- Identify processes using a TCP socket:
+
+`fuser --namespace tcp {{port}}`
+
+- Kill all processes accessing a file or directory (sends the `SIGKILL` signal):
+
+`fuser --kill {{path/to/file_or_directory}}`
+
+- Find which processes are accessing the filesystem containing a specific file or directory:
+
+`fuser --mount {{path/to/file_or_directory}}`