sim7600 driver for ubuntu
put gprs-connect-chat, gprsdial, startup.sh to /etc/ppp/
autorun with system startup, edit /etc/rc.local, add "sh etc/ppp/startup.sh"
auto check ppp status
edit .profile, add "/path/to/this/git/start_monitor.sh > 1.log"
add execute permission "chomd +x start_monitor.sh"