Does anyone know about software that can detect or monitor host / url are being accessed by ubuntu? I want to see what host/url are beeing accessed by installed software or by my internet browser.
For just watching general traffic destinations, I like using iftop:
It'll show a live report with speeds, through-put, etc:
For watching your browser, I recommend the Tamper Data extension for Firefox. Opening its window will show you all the active and historical requests:
Hmmm, you can set up a http proxy software (like squid) and using that: proxy server will log accesses. Another solution: use netfilter of the linux kernel (with