Update cheatsheets

finger

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# finger
+
+> User information lookup program.
+> More information: <https://manned.org/finger>.
+
+- Display information about currently logged in users:
+
+`finger`
+
+- Display information about a specific user:
+
+`finger {{username}}`
+
+- Display the user's login name, real name, terminal name, and other information:
+
+`finger -s`
+
+- Produce multiline output format displaying same information as `-s` as well as user's home directory, home phone number, login shell, mail status, etc.:
+
+`finger -l`
+
+- Prevent matching against user's names and only use login names:
+
+`finger -m`