Find out log file who enter my pc
Let ,I am administrator of Linux Enterprise Server and i have 5 user . Every user can access my Linux server for using their owd user ID. Now i have two questions :
If one of them , enter my pc using "root" password or their
"own password" , I want to make trace or i want to find out the log files so that i understnad what they did in my Linux server
in both cases using "root" password or using "their own" password . Is there any tools for this purpose ? Plz help...