Answer / navisite

you can use fuser -uc <filesystem>

it will list out the user (if any) accessing the filesystem.

If you want to forcefully remove the user from the
filesystem use

fuser -k <filesystem>

this will log the user off from the filesystem.

Answer / p.ashwini

we can use finger command
finger is similar to that of "w" command .If the user
workes with a special file it would not be shown in the
list with "w" command.That file can be seen with figer
command

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