command inactive session for linux

[Sam.D]

I'm looking for a command to know how long a session has not been used. I would like to know if anyone knows a command doing so. I am usin Linux distribution debian. Thank you for your help.

[newtech]

Look at the side of the "last" may be ...

[Sam.D]

I have studied a little about this command, but unfortunately I can not find the information I want. But for the message I thank you anyway because I did not know this command and I have noticed that it was interesting. If someone with another idea to suggest I am taker!

[Expertz]

w?
man w
w - [husfV] [user]

[Sam.D]

I thank you for your help, this is quite what I was looking for!