linux encourges me to use more cloud services
Since most user-friendly softwares in windows have no linux version.If we want to play music,process a word excel,look up dictionary,all such needs us to install relative software by ourselves.Due to the reason of copyright protection,most linux version offer no private format support directly for users.For example,mp3 format,though it is most popular in windows services.I find it is also very nice to use ogg format music in linux.It is much smaller in size and even  better in tune.Well,then the question would be how can I convert my mp3 files quickly and conveniently to ogg files in linux?