1. napriklad na webu FAI vygenerujeme instalacni img
2. vypalime na instalacni medium
3. vlozime img do ciloveho stroje, kde je cilove medium
4. cekame minimalne 20min
5. rebootneme do nainstalovaneho systemu

apt install wvdial

nano /etc/wvdial.conf

wvdial.conf

[Dialer Defaults]
Modem = /dev/ttyUSB2
Modem Type = Analog Modem
ISDN*= 0
Baud = 460800
Dial Attempts = 1
Username = o2
Password = o2
Init1 = ATZ
Init2 = AT&F &D2 &C1
Init3 = ATS7=60 S30=0 S0=0
Init4 = AT+CGDCONT=1,"IP","internet"
Phone = *99#
Stupid Mode = 1

vyzkousime wvdial

pak do /etc/network/interfaces jako prvni

auto ppp0
iface ppp0 inet wvdial

a reboot, default routa by mela jit pres ppp0