My first notebook upgrade: I repaired my old HP nc4010 (bought a new hinge on ebay) and realized this was the perfect way to test out the upgrade to 5.2 before doing it on my production notebook. First I updated to 'current' 5.1 (by current I mean I have not synced my 5.1 local repo since building my 5.2 repo). I had not used my nc4010 for a while and the kernel was at 2.6.18-53.1.13 (update took it to 1.21). Rebooted and system still working. I then pointed my CentOS-Base.repo to my 5.2 repo. I did a yum clean all then a yum update yum* rpm and below is what happened: ======================================================= [root at nc4010 yum.repos.d]# yum clean all Loading "installonlyn" plugin Cleaning up Everything [root at nc4010 yum.repos.d]# yum update yum* rpm Loading "installonlyn" plugin Setting up Update Process Setting up repositories http://linuxdownload.adobe.com/linux/i386/repodata/repomd.xml: [Errno 4] IOError: <urlopen error (-3, 'Temporary failure in name resolution')> Trying other mirror. Error: Cannot open/read repomd.xml file for repository: adobe-linux-i386 [root at nc4010 yum.repos.d]# /etc/sysconfig/network-scripts/ifup-eth eth0 [root at nc4010 yum.repos.d]# yum update yum* rpm Loading "installonlyn" plugin Setting up Update Process Setting up repositories adobe-linux-i386 100% |=========================| 951 B 00:00 kbs-CentOS-Extras 100% |=========================| 951 B 00:00 base 100% |=========================| 1.3 kB 00:00 updates 100% |=========================| 951 B 00:00 addons 100% |=========================| 951 B 00:00 extras 100% |=========================| 1.1 kB 00:00 Reading repository metadata in from local files primary.xml.gz 100% |=========================| 10 kB 00:00 ################################################## 17/17 primary.xml.gz 100% |=========================| 157 B 00:00 primary.xml.gz 100% |=========================| 821 kB 00:00 ################################################## 2453/2453 primary.xml.gz 100% |=========================| 91 kB 00:00 ################################################## 165/165 primary.xml.gz 100% |=========================| 157 B 00:00 primary.xml.gz 100% |=========================| 74 kB 00:00 ################################################## 244/244 Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Downloading header for yum-metadata-parser to pack into transaction set. media://1213888991.267240%231/CentOS/yum-metadata-parser-1.1.2-2.el5.i386.rpm: [Errno 4] IOError: <urlopen error unknown url type: media> Trying other mirror. Error: failed to retrieve CentOS/yum-metadata-parser-1.1.2-2.el5.i386.rpm from base error was [Errno 4] IOError: <urlopen error unknown url type: media> ======================================================= I rebooted my local repo server. No change. I downloaded a new copy of yum-metadata-parser-1.1.2-2.el5.i386.rpm from mirror.centos.org/centos/5.2/os/i386/CentOS/. No change. (dated Jun 14, mine was dated Jun 24, the day I built my repo. but file sizes are identical). What am I missing here?