I solved this problem!
The reason is that networking subsystem does not start at boot. I don't know why Canonical decided to do that)) You can add /etc/init.d/networking manually or by this command
# update-rc.d networking defaults
(i do this by sysv-rc-conf program (you can check by this program if networking script is started), but it must be installed manually by apt-get install)
I solved this problem! d/networking manually or by this command
The reason is that networking subsystem does not start at boot. I don't know why Canonical decided to do that)) You can add /etc/init.
# update-rc.d networking defaults
(i do this by sysv-rc-conf program (you can check by this program if networking script is started), but it must be installed manually by apt-get install)