While troubleshooting a possible security incident, a system administrator notices that the Linux "w" command on a server does not list the remote host from which each user is connected. Which single command-line option can the administrator add so that "w" displays the hostname or IP address of each remote connection?
-s
-u
-h
-f
The "-f" (or "--from") option tells "w" to include the "from" column, which contains the remote hostname or IP address of each logged-in user. If the field is suppressed by default, adding "-f" forces it to appear. Options such as "-h" (hide header), "-s" (short format), and "-u" (ignore username when figuring the current process) do not affect whether the remote host is displayed.
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