Update cheatsheets

linux/wall

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# wall
+
+> Write a message on the terminals of users currently logged in.
+> More information: <https://manned.org/wall>.
+
+- Send a message:
+
+`wall {{message}}`
+
+- Send a message to users that belong to a specific group:
+
+`wall --group {{group_name}} {{message}}`
+
+- Send a message from a file:
+
+`wall {{file}}`
+
+- Send a message with timeout (default 300):
+
+`wall --timeout {{seconds}} {{file}}`