dhclient is the DHCP client. If you are using TCP/IP, and not using static IP for your embedded platform, your choice is either use DHCP or BOOTP, both of which use dhclient(8). If your DHCP or BOOTP server passes any domain or nameserver information, dhclient will attempt to write it to /etc/resolv.conf. This is, of course, dependent on your environment: whether TCP/IP is used, and whether information for the resolver is passed by your DHCP/BOOTP server.
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