On Fri 31 May 2019 at 13:31:51 +0100, Brian wrote: > On Fri 31 May 2019 at 07:20:24 -0500, Richard Owlett wrote: > > > With the first DVD of Debian 9.8.0 I did: > > dd if=/dev/cdrom of=dvd.iso bs=4M > > I edited sources.list to read > > deb file:///home/richard/dvd.iso stretch main contrib trusted=yes > > > > When running Synaptic's > > Edit->Reload Package Information > > I receive an error message: > > > The repository 'file:/home/richard/dvd.iso stretch Release' > > > does not have a Release file. > > > > What is the problem? > > >From sources.list(5): > > The currently recognized URI types are: > > file > The file scheme allows an arbitrary directory in the file > system to be considered an archive. > > An ISO is not an "arbitrary directory".
Now that that has been sorted out we can move on with some educational problem solving. You have used the sources.list entry: deb file:///home/richard/dvdmount stretch main contrib trusted=yes This line is incorrect; the format for an entry is in sources.list(5). You then replaced this entry with another one that was also incorrect, getting the error message The repository 'file:/home/richard/dvdmount stretch Release' is not signed. I suggest you devise a valid entry and post it here. After 'apt update' you will get a different error message that will enable you to progress to a solution. -- Brian.