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error related image is uploaded we want to install ATutor on Linux server Ubuntu 16.0.4 but we encountered errors as :some files not found or "sudo apt-get update" gives errors seen in attached image most important ERROR FAIL TO FETCH CDROM. How to resolve

enter image description here

edwinksl
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iqra aslam
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1 Answers1

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i have already resolved this issue the solution is write on command prompt "cd /etc/apt" then type "ls" after this "sudo nano sources.list" sources file will open then insert a # berfore the line cdrom starts.After this press Ctrl+X then enter y and press Enter the file will be saved in edited form.and the error will be solved. –Or you can visit the this link for more clarity "https://www.youtube.com/watch?v=bfyobrcSx1Q"

iqra aslam
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