1*4882a593Smuzhiyun# Latest just before 20210817T000000Z: 2*4882a593Smuzhiyundeb [check-valid-until=no] http://snapshot.debian.org/archive/debian/20210902T205533Z/ bullseye main 3*4882a593Smuzhiyundeb [check-valid-until=no] http://snapshot.debian.org/archive/debian-security/20210902T193650Z/ bullseye-security main 4*4882a593Smuzhiyundeb [check-valid-until=no] http://snapshot.debian.org/archive/debian/20210902T205533Z/ bullseye-updates main 5