I am going to disable all or some of Dash search plugins (scopes). I can do it in Dash GUI one by one (see http://askubuntu.com/a/355523/103599) but it seems to me unpractical as there are 56 plugins installed now. Therefore I am going to disable them from command line like this:
gsettings set com.canonical.Unity.Lenses disabled-scopes "['more_suggestions-amazon.scope', 'more_suggestions-u1ms.scope', 'more_suggestions-populartracks.scope', 'music-musicstore.scope', 'more_suggestions-ebay.scope', 'more_suggestions-ubuntushop.scope', 'more_suggestions-skimlinks.scope']"
But for this I need to know the names of all scopes, not only amazon, ebay, etc... How can I do it?