i have enabled PPP network using GSM modem and same time i have connected Ethernet cable also. When PPP enabled, first priority has taken by PPP and second priority has taken by Eth0. but i want first priority Eth0 and second priority PPP connection how to do?. here ifmetric package was i am not able to installing. So how to set a network priority.
By "network priority", did you mean "primary connectivity" aka default route?
Please take a look at this thread:
There's also this one that can come in handy: https://community.onion.io/topic/4196/faq-how-can-i-control-which-network-interface-is-used-for-network-traffic-like-use-wifi-in-some-cases-but-ethernet-in-others