Where is this file a20_Lime2_debian_second_release.7z ?

[abbma]

Why don't you give a direct link from your webpage  https://www.olimex.com/wiki/A20-OLinuXino-LIME2
Thank you

[LubOlimex]

We used to have direct downloads before but the problem was that a lot of bot programs abused the direct downloads. This triggered hidden download limits and ultimately lead to greater unavailability of the files (despite that we used the the paid hosting services of Google). Most customers requested that we use a torrent system instead.

Best regards,
Lub/OLIMEX