[root@armadillo-iotg (ttymxc1) ~]# ifup usb0
3G connect
success
ifconfig: SIOCGIFFLAGS: No such device
[root@armadillo-iotg (ttymxc1) ~]# random: nonblocking pool is initialized

[root@armadillo-iotg (ttymxc1) ~]# ping www.atmark-techno.com
ping: unknown host www.atmark-techno.com
[root@armadillo-iotg (ttymxc1) ~]# ping https://www.atmark-techno.com/
ping: unknown host https://www.atmark-techno.com/
[root@armadillo-iotg (ttymxc1) ~]# ping www.atmark-techno.com/
ping: unknown host www.atmark-techno.com/
[root@armadillo-iotg (ttymxc1) ~]# ping www.atmark-techno.com
ping: unknown host www.atmark-techno.com
[root@armadillo-iotg (ttymxc1) ~]#