Update cheatsheets

linux/w

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# w
+
+> Display who is logged in and their processes.
+> More information: <https://www.geeksforgeeks.org/w-command-in-linux-with-examples/>.
+
+- Display information about all users who are currently logged in:
+
+`w`
+
+- Display information about a specific user:
+
+`w {{username}}`
+
+- Display information without including the header:
+
+`w --no-header`
+
+- Display information without including the login, JCPU and PCPU columns:
+
+`w --short`