[CentOS] multiple ifcfg-x locations on CentOS-6

James B. Byrne

byrnejb at harte-lyne.ca
Fri Oct 7 19:57:47 UTC 2011


CentOS-5
$ ll /etc/sysconfig/networking/profiles/*
total 0
$ ll /etc/sysconfig/networking/devices
total 0

CentOS-6
$ ll /sysconfig/networking/profiles
total 4
drwxr-xr-x. 2 root root 4096 Oct  7 15:19 default
$ ll /sysconfig/networking/profiles/*
total 24
-rw-r--r--. 2 root root 158 Oct  7 15:19 hosts
-rw-r--r--. 2 root root 116 Oct  7 15:19 ifcfg-br0
-rw-r--r--. 2 root root 238 Oct  7 15:24 ifcfg-eth0
-rw-r--r--. 2 root root 117 Oct  7 15:19 ifcfg-eth1
-rw-r--r--. 2 root root  40 Oct  7 15:19 network
-rw-r--r--. 2 root root 120 Oct  7 15:25 resolv.conf


$ ll /etc/sysconfig/networking/devices
total 12
-rw-r--r--. 2 root root 116 Oct  7 15:19 ifcfg-br0
-rw-r--r--. 2 root root 238 Oct  7 15:24 ifcfg-eth0
-rw-r--r--. 2 root root 117 Oct  7 15:19 ifcfg-eth1

I spent the better part of two hours trying to discover
why I could not configure br0 to start after modifying
/etc/sysconfig/network-scripts following my previously
succesful notes. I finally deleted ifcfg-bro and used the
existing ifcfg-eth0 and -eth1 scripts to at least get a
network connection working.  When I start the network
service I only saw l0 and eth0 start as eth1 is disabled. 
However, when I did an ifconfig I saw that br0 is
configured as well, but not by me.

Looking for br0 in the file system led me to the
directories listed above.  I do not recall seeing these
before and the only difference between this CentOS box and
the previous virtual host I installed is that this time I
selected the virtual host install option instead of
minimal install.  Evidently this was a misstep on my part.
 One that I doubt I shall repeat.

My questions are:  What are these duplicate, and
identical, files doing in multiple places on my system;
and why are they evidently interfering with the normal
processing of /etc/sysconfig/network-scripts through the
service utility?




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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
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