I have installed debian 8 jessie via usb stick on my thinkpad x250 (the laptop doesn't have any cd-dvd rom). Now when i want to use the synaptic or install some programms (especifically pure data) via:
sudo apt-get install puredata i get this in terminal:
Media change: please insert the disc labeled 'Debian GNU/Linux 8.4.0 Jessie - Official i386 DVD Binary-1 20160402-13:26' in the drive '/media/cdrom/' and press enter
Why this happens and how am i supposed to insert a dvd when i haven't any dvd-rom? How can i fix this?