Finding last reboot, shutdown time and failed login attempts

Finding last reboot time:

# last reboot

# last -F

# who -b

Finding last shutdown time:

# last -x | grep '^shutdown'

Listing out failed login attempts:

# lastb

The other straight forward way to find the failed login attempts is to analyze the /var/log/secure file. I have written a Perl script exclusively to report the failed login attempts by parsing the /var/log/secure file.

Get the script from here: http://smart-scripts-for-sysadmins.blogspot.com/2012/05/perl-script-to-list-failed-login.html