#!/bin/bash 
 
#useing parameter ip:netmask:gateway:dns1  
#system version:centos6,7/redhat6,7 
 
#read parameter 
ipaddr=`echo $1|cut -d ":" -f 1` 
netmask=`echo $1|cut -d ":" -f 2` 
gateway=`echo $1|cut -d ":" -f 3` 
dns1=`echo $1|cut -d ":" -f 4` 
dns2=`echo $1|cut -d ":" -f 5` 
targetDevice=$2 
 
#get device(active) name -- centos6 and centos7 
DEVICE=`dmesg|grep Link|grep Up|cut -d ":" -f 3,4|cut -d " " -f 2|cut -d ":" -f 1|uniq|head -n 1` 
#if parameter has device name,use it ,else use first alive device 
if [ "$targetDevice" != "" ]; then 
  DEVICE=$targetDevice 
  echo 'device use target device :' $DEVICE 
fi 
 
#backup net_file 
mv  /etc/sysconfig/network-scripts/'ifcfg-'$DEVICE  /etc/sysconfig/network-scripts/'ifcfg-'$DEVICE'.bak' -f 
 
#config(net_file) 
cat <<end /etc/sysconfig/network-scripts/'ifcfg-'$DEVICE 
DEVICE=$DEVICE 
ONBOOT=yes 
TYPE=Ethernet 
BOOTPROTO=none 
IPV6INIT=no 
DEFROUTE=yes 
IPADDR=$ipaddr 
GATEWAY=$gateway 
NETMASK=$netmask 
DNS1=$dns1 
DNS2=$dns2 
end 
 
#update /etc/hosts 
cat /sensor/bin/standardhosts>/etc/hosts  
echo '127.0.0.1 '$(hostname)/etc/hosts 
 
#grant the net_file 
chmod 755 /etc/sysconfig/network-scripts/'ifcfg-'$DEVICE 
 
#restart network 
/etc/init.d/network restart 

nm_object_array_demarshal: couldn't create object for /org/freedesktop/NetworkManager/ActiveConnection/39
Error: Obtaining active connection for'/org/freedesktop/NetworkManager/ActiveConnection/39' failed.
                             [FAILED]

 See ‘systemctlstatus network.service‘ and ‘journalctl-xn‘ for details

Bringing up interface enp4s0f0: RTNETLINK answers: File exists

Bringing up interface eth0: Device eth0 does not seem to be present,delaying initialization.