We bought a small box as our server and we installed ubuntu linux.
We don't plug any display to it, instead, we remote desktop/vnc to the server (using TightVNC).
However, the display by default is around 1024x768 and our local display is usually much larger.
How could we change the resolution on the server without a display? Preferably, it is setup during the boot time. It is also OK to change at VNC time.
( when we plug a display, it works perfectly )