gistfile1.txt

Initial output of command ifconfig - 

jenkins@ubuntu:~$ ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:180 errors:0 dropped:0 overruns:0 frame:0
          TX packets:180 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:13512 (13.5 KB)  TX bytes:13512 (13.5 KB)
          
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jenkins@ubuntu:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback
source-directory interfaces.d

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jenkins@ubuntu:~$ cd /etc/network/interfaces.d/
jenkins@ubuntu:/etc/network/interfaces.d$
jenkins@ubuntu:/etc/network/interfaces.d$ ls
50-cloud-init.cfg 
jenkins@ubuntu:/etc/network/interfaces.d$

-- In this path (/etc/network/interfaces.d) the ens3.cfg this file should be injected which will setup the interface 
and the content of that file should be -

auto ens3
iface ens3 inet dhcp

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