In order to find out who was logged in recently on my server I am using the command:
There were logins from very strange IP addresses e.g.:
username@pc:/home/user$ last username pts/16 59.224.XX.178.d Sun Aug 2 12:26 - 12:27 (00:00)
(where X was a number).
My question: What does the suffix .d mean? And why are these entries gone when I am using last with the option "-i"?