Merge pull request #674 from igorshubovych/who

who: add page

pages/common/who.md

@@ -0,0 +1,19 @@
+# who
+
+> Display who is logged in and related data (processes, boot time).
+
+- Displays the username, line, and time of all currently logged-in sessions:
+
+`who`
+
+- Displays information only for the current terminal session:
+
+`who am i`
+
+- Display all available information:
+
+`who -a`
+
+- Display all available information with table headers:
+
+`who -a -H`