Cannot find a valid baseurl for repo: core

[Jack Byers]

Jack Byers     byersj at hotmail.com
root at bootp yum.repos.d]# uname -a
Linux bootp 2.6.17-1.2174_FC5 #1 Tue Aug 8 15:30:55 EDT 2006 i686 i686 i386 
GNU/Linux

hitting this error  on  yum commands that worked  only a week or so ago

root at bootp byers]# yum provides lsusb
Loading "installonlyn" plugin
Searching Packages:
Setting up repositories
core                                                                 [1/3]
Cannot find a valid baseurl for repo: core
Error: Cannot find a valid baseurl for repo: core
[root at bootp byers]#

similarly
[root at bootp byers]# yum update
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
core                                                                 [1/3]
Cannot find a valid baseurl for repo: core
Error: Cannot find a valid baseurl for repo: core
[root at bootp byers]#

upon googling I found a "suggestion" that
uncommenting the  "baseurl ...." line in the various
repos.d files  might help, but without explanation.

my mystery is that the above commands used to work without any change to the 
respos.d files


uncommenting the baseurl line   in  -core, -updates, -extras
then  allowed the "yum provides  lsusb"  to work as previously:
All three were necessary.


[root at bootp yum.repos.d]# yum provides lsusb
Loading "installonlyn" plugin
Searching Packages:
Setting up repositories
core                                                                 [1/3]
updates                                                              [2/3]
extras                                                               [3/3]
Reading repository metadata in from local files
Importing additional filelist information

usbutils.i386                            0.71-2               core
Matched from:
/sbin/lsusb
/usr/share/man/man8/lsusb.8.gz

usbutils.i386                            0.71-2               installed
Matched from:
/sbin/lsusb
/usr/share/man/man8/lsusb.8.gz
[root at bootp yum.repos.d]#


I have still not changed -development, -extras-development, updates-testing
I would appreciate some feedback on this behavior,
especiallly before I go much further and really mess up my system.

--is it now required that these baseurl lines be uncommented?

Jack

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