you can use the grep command, but you will need to know what exactly it is you are looking for....
IE
grep "ERROR" /var/log/hostd.log - this will return every line in the hostd.log that contains ERROR
or you can grep all log files by using * and -r for recursive
grep -r "error" /var/log/*
Other options you could syslog to either vMA or any syslog appliance, or use splunk or some kind of log file parser to search...
Hope this helps.