Yum not working after re-install.

redhat5 · 07-28-2009, 01:30 PM

I accidently removed yum from my RHEL5 system and then reinstalled it following instructions from a website.

The install was successful but yum is not working.

When i type in

yum check-update

it returns

[root@localhost ~]# yum check-update
Gathering header information file(s) from server(s)
Server: Red Hat Linux 5Client - i386 - Base
retrygrab() failed for:
http://mirror.dulug.duke.edu/pub/yum...rs/header.info
Executing failover method
failover: out of servers to try
Error getting file http://mirror.dulug.duke.edu/pub/yum...rs/header.info
[Errno 4] IOError: <urlopen error >

I am a newbie and dont know, what to do now?

watcher69b · 07-28-2009, 02:38 PM

can you dig mirror.dulug.duke.edu ?
if not then there is a DNS issue and you need to check your /etc/resovl.conf

redhat5 · 07-29-2009, 05:43 AM

What does
digging means here?

Sorry!

repo · 07-29-2009, 05:45 AM

It is just a command

Code:

dig mirror.dulug.duke.edu

Code:

cannabis:/home/repo# dig mirror.dulug.duke.edu

; <<>> DiG 9.5.1-P2 <<>> mirror.dulug.duke.edu
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62433
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;mirror.dulug.duke.edu.		IN	A

;; ANSWER SECTION:
mirror.dulug.duke.edu.	1767	IN	CNAME	newmirror.dulug.duke.edu.
newmirror.dulug.duke.edu. 1767	IN	A	152.3.220.162

;; Query time: 198 msec
;; SERVER: 10.0.0.1#53(10.0.0.1)
;; WHEN: Wed Jul 29 12:44:11 2009
;; MSG SIZE  rcvd: 79

cannabis:/home/repo#

man dig

redhat5 · 08-08-2009, 03:48 AM

[root@localhost ~]# dig mirror.dulug.duke.edu

; <<>> DiG 9.3.3rc2 <<>> mirror.dulug.duke.edu
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52996
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 4, ADDITIONAL: 0

;; QUESTION SECTION:
;mirror.dulug.duke.edu. IN A

;; ANSWER SECTION:
mirror.dulug.duke.edu. 1800 IN CNAME newmirror.dulug.duke.edu.
newmirror.dulug.duke.edu. 1800 IN A 152.3.220.162

;; AUTHORITY SECTION:
dulug.duke.edu. 86400 IN NS authdns1.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns2.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns3.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns4.netcom.duke.edu.

;; Query time: 797 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Sat Aug 8 14:18:30 2009
;; MSG SIZE rcvd: 178

[root@localhost ~]#

What doe this mean?

What to do now?

watcher69b · 08-09-2009, 03:25 AM

Quote:

Originally Posted by redhat5

;; QUESTION SECTION:
;mirror.dulug.duke.edu. IN A

you asked for the IP for mirror.dulug.duke.edu

Quote:

;; ANSWER SECTION:
mirror.dulug.duke.edu. 1800 IN CNAME newmirror.dulug.duke.edu.
newmirror.dulug.duke.edu. 1800 IN A 152.3.220.162

the responce you got back (shows DNS is working)

Quote:

;; AUTHORITY SECTION:
dulug.duke.edu. 86400 IN NS authdns1.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns2.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns3.netcom.duke.edu.
dulug.duke.edu. 86400 IN NS authdns4.netcom.duke.edu.

tells you what DNS servers provided the answer

Quote:

;; Query time: 797 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Sat Aug 8 14:18:30 2009
;; MSG SIZE rcvd: 178

basic information can be used to catch a man in the middle DNS

can you manually go to http://mirror.dulug.duke.edu
do you see the repo?
I personally cannot access it from here.

watcher69b · 08-09-2009, 03:28 AM

try pointing yum to http://mirror.centos.org/centos-5/

there is a thread by me about how to update RHEL via CentOS repos

redhat5 · 08-10-2009, 06:15 AM

How to do that----point yum to a web address?

Can you please reply with some DEFINITE INSTRUCTIONS so that i can do what you are suggesting?

I dont know, how to point yum to www.-----.com

Thank You

watcher69b · 08-11-2009, 07:49 AM

http://www.linuxquestions.org/questi...-repos-696783/