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With my box FC5 at work (Active Directory), I have been able to access the net , I have not logged in with my AD account , I logged in as username : root and password : forum,,,fake one (I know security implication, I have done this for test ).

First time when I tried to open a browser, window popped up asking me username and password for authentication to use internet (I entered my username: zillah and password:ad123 my active directory account,,,fake ), then I was able to browse the net.

When I tried to use the command below (via Terminal):

[root@local]#yum install yum (yumes),,,,It did not work, I believe because of the authentication (ISA proxy) that I mentioned above.

With the proxy , I followed the link below :

http://fedora.redhat.com/docs/yum/sn-yum-proxy-server.html

1- I added the line below to /etc/yum.conf

proxy=http://proxy.ewrq.au:8080,,,,,,,,,,,,,,,, because our ISA uses 8080 proxy
proxy_username=zillah,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,fake username
proxy_password=ad123,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,fake password

Then I tried to use this :
[root]#yum update yum,,,,,,,,,,,,,,,,,,I received this error :

Loading "installation" Plugin
Settingup Update Process
Setting up repositories
Can not find a valid baseurl for repo:case
Error: Cannot find valid baseurl for repo:core


2- I removed the configuration above and I tried these:

http_proxy=" http://zillah:ad123@proxy.ewrq.au:8080 "
export http_proxy
yum update

[root@localhost # yum update yum
Traceback (most recent call last):
File "/usr/bin/yum", line 29, in ?
yummain.main(sys.argv[1:])
File "/usr/share/yum-cli/yummain.py", line 80, in main
base.getOptionsConfig(args)
File "/usr/share/yum-cli/cli.py", line 177, in getOptionsConfig
self.doConfigSetup(fn=opts.conffil* e, root=root)
File "/usr/lib/python2.4/site-packages/* yum/__init__.py", line 102, in doConfigSetup
self.conf = config.readMainConfig(fn, root)
File "/usr/lib/python2.4/site-packages/* yum/config.py", line 567, in readMainConfig
confparser.read(configfile)
File "/usr/lib/python2.4/site-packages/* yum/parser.py", line 126, in read
ConfigParser.read(self,filename)
File "/usr/lib/python2.4/ConfigParser.p* y", line 267, in read
self._read(fp, filename)
File "/usr/lib/python2.4/ConfigParser.p* y", line 490, in _read
raise e
ConfigParser.ParsingError: File contains parsing errors: /etc/yum.conf
[line 15]: 'export http_proxy\n'
[line 16]: 'yum update\n'

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Last Post by zillah
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[root]#yum update yum,,,,,,,,,,,,,,,,,,I received this error :

Loading "installation" Plugin
Settingup Update Process
Setting up repositories
Can not find a valid baseurl for repo:case
Error: Cannot find valid baseurl for repo:core

Sounds like you may want to try to cleaning yum prior to updating:

# yum clean all

2- I removed the configuration above and I tried these:

Did you put this in the global yum configuration file, or in your bash profile? Remember, the yum documentation only recommends this for a single user (and to put it in the bash profile).

0

1- First I updarded (not fresh installation) from FC5 to FC6

2- Then I configured /etc/yum.conf with this :
proxy=http://proxy.ewrq.au:8080
proxy_username=zillah
proxy_password=ad123

3- I tried from a shell console as root
[root@localhost ~]# yum update yum
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
Could not retrieve mirrorlist http://mirrors.fedoraproject.org/mi...ore-6&arch=i386 error was
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Error: Cannot find a valid baseurl for repo: core


4- [root@localhost ~]# yum clean all
Loading "installonlyn" plugin
Cleaning up Everything


5- [root@localhost ~]# yum update yum
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
Could not retrieve mirrorlist http://mirrors.fedoraproject.org/mirrorlist?repo=core-6&arch=i386 error was
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>
Error: Cannot find a valid baseurl for repo: core
[root@localhost ~]#

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