Search notes:

/var/log/btmp

/var/log/btmp records bad login attemps.
The wtmp file records all logins and logouts.

Format

Its format is exactly like utmp except that a null username indicates a logout on the associated terminal
file interestingly reports it to be a dBase III file: 
$ file /var/log/btmp
btmp: dBase III DBT, version number 0, next free block index 6

See also

/var/log
/var/log/wtmp, /var/log/lastlog, /var/log/faillog

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1758204402, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/var/log/btmp(52): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78