How many users are logging in system

Display total connect time of users

Ac command will display the statistics about the user’s connect time.

Connect time for the current logged in user

With the option –d, it will break down the output for the individual days. In this example, I’ve been logged in to the system for more than 6 hours today. On Dec 1st, I was logged in for about 1 hour.

# ac –d

Dec  1  total        1.08
Dec  2  total        0.99
Dec  3  total        3.39
Dec  4  total        4.50
Today   total        6.10

Connect time for all the users

To display connect time for all the users use –p as shown below. Please note that this indicates the cumulative connect time for the individual users.

# ac -p 

        harry                               3.64
        madison                             0.06
        sanjay                              88.17
        nitesh                              105.92
        rakesh                              111.42
        total 309.21

Connect time for a specific user

To get a connect time report for a specific user, execute the following:

# ac -d nitesh

Jul  2  total       12.85
Aug 25  total        5.05
Sep  3  total        1.03
Sep  4  total        5.37
Dec 24  total        8.15
Dec 29  total        1.42
Today   total        2.95