I have just installed ubuntu alongside with windows, but I have switched the sizes I wished for their partitions, with windows with about 500GB and ubuntu with about 100GB, though I wanted the other way around.
Can I just change the sizes of the partitions with the boot dvd or I have to format the HDD and do it over again?
Allright mates I lauched gparted as required. Thing is have my linux partition inside another one, "extended", which I am not allowed to unmount even when booting from live DVD. In other words, sda4 (the extended) includes sd65 (with ubuntu) and sda5 (the swap).
This happened after second installation process. I don't know why the installation process made that. Anyway, I cannot work with remaking sizes while not unmounting sda4.