I have notice while issuing "ip add" command that at the end there was a Segmentation fault msg. # ip add 1: lo: <LOOPBACK> mtu 16436 qdisc noop link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 0...