In this thread (askubuntu.com/questions/272796/connecting-to-archive-ubuntu-com-takes-too-long) I find a solution, that is
to edit /etc/gai.conf and uncommenting the line:
________________________ # # For sites which prefer IPv4 connections change the last line to # precedence ::ffff:0:0/96 100 ________________________
In this thread (askubuntu. com/questions/ 272796/ connecting- to-archive- ubuntu- com-takes- too-long) I find a solution, that is
to edit /etc/gai.conf and uncommenting the line:
_______ _______ _______ ___ _______ _______ ___
#
# For sites which prefer IPv4 connections change the last line to
#
precedence ::ffff:0:0/96 100
_______