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I mark some packages for installation but I get Fig. 1 Asking to insert the installer DVD again in /media/cdrom but I have only its USB installer media and it does not want to have it, Fig. 2 List of failures without successful step 1

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Hardware: Asus Zenbook UX303UA
OS: Debian 8.5

1

The USB installer media contains a CD image, that's what Synaptic's looking for.

To fix this, edit /etc/apt/sources.list, remove the cdrom entries and make sure you have entries like

deb http://ftp.fr.debian.org/debian/ jessie main
deb-src http://ftp.fr.debian.org/debian/ jessie main

deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main

instead (choose an appropriate mirror close to you!). Once you've done that, refreshing in Synaptic should allow you to install packages.

If you really want to use the CD image on your USB key, leave the cdrom entries in /etc/apt/sources.list, insert your USB key, mount it and look for a file with an iso extension and a name starting with debian (e.g. debian-8.5.0-amd64-netinst.iso), then run

mount -t iso9660 -o loop /path/to/debian.iso /media/cdrom

as root. Synaptic will then be able to use the files there too. Before you remove your USB key, run

umount /media/cdrom

as root. If you used the small USB images to install Debian, you won't save much by doing this — the images contain a very small number of packages.

  • 1
    See my updated answer. – Stephen Kitt Sep 1 '16 at 12:13
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Edit your /etc/apt/sources.list file and comment the following line:

deb cdrom:[Debian GNU/Linux 8 _Jessie...

like this:

#deb cdrom:[Debian GNU/Linux 8 _Jessie...

save and update

Edit

You can use the debian ISO as repo:

mkdir /media/mountpoint  
mount -t iso9660 -o loop /path/to/debian.iso /media/mountpoint 
nano /etc/apt/sources.list

Add the following line:

deb file:///media/mountpoint jessie main contrib 

Update

  • 1
    Yes, i will edit my answer – GAD3R Sep 1 '16 at 11:51

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