Accidental File Overwrite
Earlier today, I was attempting to install flash to my debian linux through the terminal, and I was prompted by the site to edit a file called sources.list. I accidentally deleted a line, and overwrote it with a subtle variation of the line that the site gave me. Hoever, this did not work, and now, when I go to install a package file or something in that general area, I get a notification saying that line #2 is not valid, and the entire file cannot be read for the sources. I don't know what the original line was, is there any way I can recover the file to how it existed before I made the changes? If not, how can I fix this problem, or will I have to end up reinstalling linux to my computer? I only have the netbook, and an unrooted android phone (That won't tether to the computer), plus an 8GB flash drive.