Log files. They're there for a reason -- to keep track of what goes on behind the velvet curtain of your operating system. When things go wrong, entries are added to those log files, so you can view ...

I'm running Debian 3.1 and I see the following entries in /var/log/auth.log. I don't have any cron jobs added that would be doing this by design, so I'm unsure what's ...

Failed logins can be legitimate human error or attempts to hack your Linux system, but either way they might flag something that warrants attention. Repeated failed ...