You have successfully logged on a Linux system. You want to now cover your track. Your login attempt may be logged on several files located in /var/log. Which file does NOT belong to the list:
/var/log/btmp: keeps a note of all failed login attempts.
/var/log/utmp: current login state by user.
/var/log/wtmp: record of each login/logout.
/var/log/lastlog: holds every user’s last login. A binary file you can read via lastlog command.
var/log/auth.log or /var/log/secure:
Keep authentication logs for both successful or failed logins, and authentication processes. Storage depends on system type. For Debian/Ubuntu, look in /var/log/auth.log. For Redhat/CentrOS, go to /var/log/secure.
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