On Jun 18, 2016, at 5:50 PM, Bachir Bachir <bachir_bac at yahoo.com> wrote: > I downloaded Centos 7 and i want to update from local usb i created using dd if=cenots7 of=/dev/sdc i dont want to reinstall, i need just to update.What would be the best way to do so pleaseThanks muchBachir There is no supported mechanism for upgrading from CentOS6 to CentOS7. The unsupported ways of doing it can leave you system broken. Better to just back up your data and reload with the CentOS7 media. -- Jonathan Billings <billings at negate.org>