[root@paldo:/etc/network/if-up.d]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:BF:E1:1B:C3  
          inet addr:169.254.151.23  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:7383 (7.2 Kb)
          Interrupt:10 Base address:0xa000 

lo        Link encap:Local Loopback  
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4098 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4098 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:306124 (298.9 Kb)  TX bytes:306124 (298.9 Kb)

loopback: error fetching interface information: Device not found
[root@paldo:/etc/network/if-up.d]# dhcpcd eth0
[root@paldo:/etc/network/if-up.d]# dhcpcd.sh: interface eth0 has been configured with new IP=192.168.2.100

[root@paldo:/etc/network/if-up.d]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:50:BF:E1:1B:C3  
          inet addr:192.168.2.100  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:43 errors:0 dropped:0 overruns:0 frame:0
          TX packets:125 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:16581 (16.1 Kb)  TX bytes:16238 (15.8 Kb)
          Interrupt:10 Base address:0xa000 

lo        Link encap:Local Loopback  
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4802 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4802 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:358684 (350.2 Kb)  TX bytes:358684 (350.2 Kb)

loopback: error fetching interface information: Device not found