Updating qt sdk in ubuntu?
I have installed Qt 4.7.3 from package. How to update Qt to 4.7.4 in Ubuntu?
From what package? From the topic I assume you mean Qt SDK. Go into SDK maintenance tool (should be in menus. I don't know about Ubuntu, but in Kubuntu it is located under "Development" by default. If you can't find it there, you can run the binary located in QtSDK root).
Then, select Package Manager -> Qt SDK -> Development Tools -> Decktop Qt -> Qt 4.7.4. From there, it's just hitting "Next" twice - maintenance tool will handle download and installation automatically.
Qt 4.8 final should be available in a couple of days, too (RC is in experimental).