I'm trying to install tk-devel-8.4.13-3 using rpm -ivh [package name], and I get a list of failed dependencies. That's OK.

I download those rpms and install them the same way. However, I get stuck when one package needs the other to install itself, _and_ vice versa:


# rpm -ivh libX11-devel-1.0.3-8.el5.x86_64.rpm
warning: libX11-devel-1.0.3-8.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID e8562897
error: Failed dependencies:
libXdmcp-devel is needed by libX11-devel-1.0.3-8.el5.x86_64
xorg-x11-proto-devel >= 7.1-2 is needed by libX11-devel-1.0.3-8.el5.x86_64

# rpm -ivh xorg-x11-proto-devel-7.1-9.el5.centos.x86_64.rpm
warning: xorg-x11-proto-devel-7.1-9.el5.centos.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID e8562897
error: Failed dependencies:
mesa-libGL-devel is needed by xorg-x11-proto-devel-7.1-9.el5.centos.x86_64

# rpm -ivh mesa-libGL-devel-6.5.1-7.2.el5.x86_64.rpm
warning: mesa-libGL-devel-6.5.1-7.2.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID e8562897
error: Failed dependencies:
libX11-devel is needed by mesa-libGL-devel-6.5.1-7.2.el5.x86_64


So, I need xorg-x11 to install libX11. Xorg-x11 needs mesa-libGL to install, and mesa-libGL needs libX11 to install. Great.

I'd use yum to install it (since apparently yum can cheat around the package interdependencies), but then I get this problem:

# yum install tk-devel-8.4.13-3.fc6.x86_64.rpm
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=x86_64&repo=os error was
[Errno 4] IOError: <urlopen error (111, 'Connection refused')>
Error: Cannot find a valid baseurl for repo: base


Thanks.

EDIT: Problem solved. Can't edit the first post anymore to say that though. Anyway, if other people come across this problem, here's what I did.





As for yum not working properly, I'm at an institute that's behind a proxy. I did go to the /etc/yum.conf file and add

"proxy=http://[myproxy]"

and Yum started working somewhat better.

However, I still get this problem:

Downloading Packages:
(1/5): libX11-devel-1.0.3 100% |=========================| 666 kB 00:00
(2/5): libXdmcp-devel-1.0 100% |=========================| 7.5 kB 00:00
(3/5): xorg-x11-proto-dev 100% |=========================| 253 kB 00:00
(4/5): mesa-libGL-devel-6 100% |=========================| 465 kB 00:00
(5/5): libX11-1.0.3-8.0.1 100% |=========================| 796 kB 00:00
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897


GPG key retrieval failed: [Errno 4] IOError: <urlopen error (111, 'Connection refused')>


I see that the GPG key retrieval error is relatively common, but I seem to find very little that's related to urlopen error 111.

I edited the /etc/yum.repos.d/CentOS-Base.repo and changed the gpgcheck=1 to gpgcheck=0 for all the lines, but it appears to have made no difference.


[Edit: Removing the comments on the baseurl seems to have though. Everything now works. For reference for anyone who looks, my CentOS-Base.repo looks like this:

enabled=0 and gpgcheck=0 and baseurl un-un-comment were my only changes.


# CentOS-Base.repo
#
# [...]
#

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=upd$
baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-5

(Et cetera)

The problem is that you need to tell both yum *and* rpm the proxy host setting; e.g. by adding a "proxy" config line in /etc/yum.conf for yum and setting a http_proxy environment variable for rpm.