Monitoring the System -Watch System log ...

tail -f /Private/var/log/system.log

This is good for watching what new apps do to your system.

---------


http://pondini.org/OSX/Logs.html

Checking the SIZE of your logs.

Many of the log files are located in the /private/var/log folder, others in /Library/Logs, and others, mostly from user applications, are in each user's <home folder>/Library/Logs folder).

             

=============================

 cat /Private/var/log/system.log