Can I see who has tried to log in to my computer?

Is there a way to see who has attempted to log into my account, and what username/password combinations they tried? I found that someone has tried to Google my password hint, and I'm wondering if they tried to access my account.
John

Hi John
If you launch terminal found in /Applications/Utilities and issue this command:
last
The output can be quite long. Last will list the sessions of users, ttys, and hosts, in reverse time order. Each line of output contains the user name, the tty from which the session was conducted, any hostname, the start and stop times for the session, and the duration of the session. Last will also show if there has been a crash or a shutdown. Why is this useful? If you know roughly when you were using the computer and eliminate those sessions then what is left is definite proof of someone else using the account to login. You can also limit the output to a specified amount of lines by adding the -n arguement, for example:
last -20
will output the last 20 log on attempts. You can also consult system.log as this will also log user activity as well as failed log on attempts. You can consult system.log using Console again found in /Applications/Utilities but seeing as you are in terminal anyway just issue this command:
tail -n /var/log/system.log
again the -n argument can be used to limit system.log to a specified amount of output (20 or 30 is a good number) otherwise the output is quite large.
Hope this helps – Tony

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