من هم مشکل استارتر را داشتم که کلیه خطوط sources.list را پاک کردم و با استفاده از آموزش این لینک :
https://wiki.debian.org/SourcesList
خطوط زیر را به sources.list اضافه و سیو کردم:
deb http://http.debian.net/debian jessie main contrib non-free
deb-src http://http.debian.net/debian jessie main contrib non-free
deb http://http.debian.net/debian jessie-updates main
deb-src http://http.debian.net/debian jessie-updates main
deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main
سپس بعد از اینکار وقتی فرمان sudo apt-get update را دادم اینها را نشان داد:
Get:1 http://security.debian.org jessie/updates InRelease [78.7 kB]
Get:2 http://http.debian.net jessie InRelease [148 kB]
Get:3 http://security.debian.org jessie/updates/main Sources [14 B]
Get:4 http://security.debian.org jessie/updates/main amd64 Packages [14 B]
Get:5 http://security.debian.org jessie/updates/main Translation-en [14 B]
Ign http://http.debian.net jessie-updates InRelease
Get:6 http://http.debian.net jessie/main amd64 Packages [6,153 kB]
Ign http://http.debian.net jessie-updates Release.gpg
Err http://http.debian.net jessie/contrib Sources
Get:7 http://http.debian.net jessie/contrib Translation-en [38.8 kB]
Get:8 http://http.debian.net jessie/main Translation-en [4,094 kB]
Err http://http.debian.net jessie/main Translation-en
Get:9 http://http.debian.net jessie/non-free Translation-en [71.5 kB]
Err http://http.debian.net jessie/main Translation-en
Err http://http.debian.net jessie/main Translation-en
Err http://http.debian.net jessie/main Translation-en
Err http://http.debian.net jessie/main Translation-en
404 Not Found
Get:10 http://http.debian.net jessie/contrib amd64 Packages [47.1 kB]
Get:11 http://http.debian.net jessie/non-free amd64 Packages [83.2 kB]
Err http://http.debian.net jessie/main Sources
Ign http://http.debian.net jessie-updates Release
Get:12 http://http.debian.net jessie/contrib Sources [62.1 kB]
Get:13 http://http.debian.net jessie/main Sources [8,110 kB]
Ign http://http.debian.net jessie-updates/main Translation-en_US
Ign http://http.debian.net jessie-updates/main Translation-en
Err http://http.debian.net jessie/non-free Sources
404 Not Found
Err http://http.debian.net jessie-updates/main Sources
Err http://http.debian.net jessie-updates/main Sources
Err http://http.debian.net jessie-updates/main amd64 Packages
Err http://http.debian.net jessie-updates/main amd64 Packages
404 Not Found
Err http://http.debian.net jessie-updates/main Sources
404 Not Found
Fetched 14.8 MB in 40min 10s (6,135 B/s)
W: Failed to fetch http://http.debian.net/debian/dists/jessie/non-free/source/Sources 404 Not Found
W: Failed to fetch http://http.debian.net/debian/dists/jessie/main/i18n/Translation-en 404 Not Found
W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/main/source/Sources 404 Not Found
W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
همانطور که میبینید در ابتدای بعضی خطوط Err وجود دارد این Err مخفف Error هستش؟ علت این Error ها چیه؟ در خطوطی که در لیست مخازن وارد کردم مشکلی وجود دارد؟
====================
دیروز خطوط ذکر شده را به sources.list وارد کردم اما اولشان # را گذاشتم که امروز فهمیدم این کار در اینجا برای غیر فعال کردن آن خط به کار میرود و اصطلاحا به اینکار کامنت (comment) میگویند.