“media change: please insert the disc labeled” when trying to install Ruby on Rails [duplicate]

This question already has an answer here:

• How can I avoid “please insert CD/DVD” error when updating Ubuntu?2 answers

When I type sudo apt-get install rails I get the message:

media change: please insert the disc labeled'Ubuntu 12.04.3 LTS _Precise Pangolin_ - Release amd64 (20130820.1)in the drive '/media/cdrom/' and press enter

I am new to Linux and I have the installation CD in the drive, but I have no idea what disc it is asking for and I'm not sure what/media/cdrom/ means. All I have is the installation CD and it is in the only optical drive I have.

apt

shareimprove this question

editedMay 23 '15 at 0:05

Braiam

43.6k16108174

asked Dec 5 '13 at 2:12

user222230

81113

marked as duplicate by Anwar, Eric Carvalho, Braiam, belacqua,Richard May 11 '14 at 0:51

This question has been asked before and already has an answer. If those answers do not fully address your question, pleaseask a new question.

 

add a comment

1 Answer

activeoldest votes

up vote26 down vote

Just remove the cdrom entry from the sources.list file. This can be done easily:

sudo sed -i '/cdrom/d' /etc/apt/sources.list

This should take care of the problem. The message is because somehow you still have the cdrom entry in your sources.list file, you can check the content of the file using:

grep -v '#' /etc/apt/sources.list

This will show you all the repositories you have activated.

shareimprove this answer

answered Dec 5 '13 at 2:16

Braiam

43.6k16108174

 

 

Which commands enable the DVD/CD on the installation USB stick, if one decides to continue using the packages on the downloaded ISO? – user75798Mar 25 '14 at 5:41

 

@user75798 you know that all the packages provided in the ISO are already installed, right? – BraiamMar 25 '14 at 6:06

 

A more cautious approach would be to edit the sources.listvi /etc/apt/sources.list and add a # in the lines to be removed. – UnderverseMay 14 at 13:05

add a comment