سلام
بعد از ابگریت از ۱۳.۰۴ به ۱۳.۱۰ برای ابدیت به این ارور بر میخورم
sudo aptitude update
Ign http://security.ubuntu.com saucy-security InRelease
Ign http://extras.ubuntu.com saucy InRelease
Ign http://ir.archive.ubuntu.com saucy InRelease
Get: 1 http://security.ubuntu.com saucy-security Release.gpg [933 B]
Get: 2 http://security.ubuntu.com saucy-security Release [49.6 kB]
Ign http://ir.archive.ubuntu.com saucy-updates InRelease
Get: 3 http://extras.ubuntu.com saucy Release.gpg [72 B]
Get: 4 http://dl.google.com stable InRelease [1,540 B]
31% [Waiting for headers] [2 Release 13.5 kB/49.6 kB 27%] [Waiting for headers]Splitting up /var/lib/apt/lists/partial/dl.google.comIgn http://dl.google.com stable InRelease
Fetched 2,545 B in 0s (2,886 B/s)
E: GPG error: http://dl.google.com stable InRelease: Clearsigned file isn't valid, got 'NODATA' (does the network require authentication?)
با تشکر