Everyday at 4am my linode graphs shows a huge spike in CPU, Network, and Disk IO. The CPU spikes to 45%.
How can I find out what is causing this? I took a look in /etc/cron.daily/ but there are a lot of items in there, and I'm not sure how to see which one(s) are running at that time. I am a little worried because the Networking is spiking huge as well, and I don't know what is going on.