Ja hento co pisal nepoznam ale jak som spominal ten porteus tak ten sa da bootovat sposobom always fresh, a nikto tam nic nezmeni (po restarte je to furt jak nove). Vseobecne porteus uklada zmeny mimo povodneho (live na HDD/USB/comkolvek) systemu takze aj ked sa ukladaju zmeny tak potom tusim staci zmazat len nejake subory a zas su zmeny prec :)
http://www.porteus.org/info/features.html
Changes to the system (customization, downloaded files, browser history and favorites, etc) can be saved persistently to your USB or hard drive, or you can boot into 'Always Fresh' mode, and no changes to your system will be saved anywhere
Ale neni v nom moc aplikacii, tusim ze firefox tam je defaultne a nic viac. Da sa ale customizovat ten samotny cisty system (dodavat tam pluginy).
Je to ale "trochu ine riesenie", ne normalne nainstaleny linux.