The Ubuntu Official Country Mirror For Nepal is: archive.mitra.net.np and np.archive.ubuntu.com/ubuntu/ (Experiencing Problems)
Currently, Nepal Telecom (NTC) has started hosting the Ubuntu repositories: np.archive.ubuntu.com or ubuntu.ntc.net.np
Edit your sources:
Simply goto: Update Manager and in the Settings tab select Ubuntu Software and Nepal as Download Sources.
Download Fast, Enjoy!
