On the Linux systems, there are three standard commands that show the information about the last logged-in users: last, last, and last log.
The output of these commands includes login-name, last login time, IP address, port, etc.
And sometimes, to keep anonymity, it is required to erase last login history.
|Lists successful login/logout history
|Shows the bad login attempts
|Shows the most recent login
Remove Information About Last Logins
To remove all the information about the last logged in users, you have to clear the files where this information is kept :
echo > /var/log/wtmp
echo > /var/log/btmp
echo > /var/log/lastlog