Update cheatsheets

tldr/atom

@@ -7,6 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > A cross-platform pluggable text editor.
 > Plugins are managed by `apm`.
+> Note: Atom has been sunsetted and is no longer actively maintained.
 > More information: <https://atom.io/>.
 
 - Open a file or directory:

tldr/linux/rm

@@ -28,3 +28,7 @@ source: https://github.com/tldr-pages/tldr.git
 - Remove specific files and directories recursively:
 
 `rm --recursive {{path/to/file_or_directory1 path/to/file_or_directory2 ...}}`
+
+- Remove empty directories (this is considered the safe method):
+
+`rm --dir {{path/to/directory}}`

tldr/passwd

@@ -18,8 +18,8 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Get the current status of the user:
 
-`passwd -S`
+`passwd {{-S|--status}}`
 
 - Make the password of the account blank (it will set the named account passwordless):
 
-`passwd -d`
+`passwd {{-d|--delete}}`