Archive for the ‘Server’ Category

CentOS to Redhat

Friday, February 5th, 2010

Before you begin, you will need the following files the Official RedHat CD/DVD/site.

Migrating from CentOS v5.4 to RedHat v5.4
Step 1: Install CentOS
Also verify you have the package pyOpenSSL installed
If not, type “yum install pyOpenSSL” as root without the quotes.

Step 2: Remove CentOS specific files
Next remove the current centos rpms from the database
# rpm -e centos-release –nodeps
# rpm -e centos-release-notes

If this doesn’t work, add the –justdb option.

Clean the yum in case you’ve used it:
# yum clean all

Step 3: Install the RedHat files

Install the files mentioned above from Redhat.
# rpm –ivh redhat-release-5Server- rhnlib-2.2.7-2.el5.noarch.rpm rhel-instnum-1.0.9-1.el5.noarch.rpm rhnsd-4.7.0-4.el5.i386.rpm rhn-check-0.4.20-9.el5.noarch.rpm rhn-setup-0.4.20-9.el5.noarch.rpm rhn-client-tools-0.4.20-9.el5.noarch.rpm yum-rhn-plugin-0.5.4-13.el5.noarch.rpm

Register you system with the rhn_reg or copy the systemid to the Redhat directory (see previous blog entry)

Remove or disable the repositories in the /etc/yum.conf.d directory

Note: If you have other rpm add-ons (such as trixbox repositories) that were originally CentOS centric and you still want to use them, then you’ll have to edit the repos. Change the $releasever to a “5” without the quotes.

Update your system:
# yum update

RedHat Repositories

Monday, February 1st, 2010

Situation: You are not the administrator of your server Redhat repository and the administrator takes a couple weeks to get back to you. You have to quickly rebuild your server in case of failure or for a test environment.

Solution: Backup the /etc/sysconfig/rhn/systemid to another location. Restore the file to the same exact server after rebuilding, verify permissions are correct (chmod 644), and you’re back in business.

Outlook 2001 and Exchange 2007

Monday, February 25th, 2008

If you’re having problems with Outlook not recognizing the Exchange server, then it’s probably a DNS issue.  When setting up a new Outlook profile, use the fully qualified domain name of the server.  If you’re not sure what it is, then ping your exchange server.  ASU’s correct setting for Outlook 2001 is not or 

Windows 2003 R2 Standard- Print Server

Tuesday, April 3rd, 2007

Symptom: The test print page is only printing half of the page and users print jobs disappear. 


Cuss out Microsoft and HP to feel better, and then uncheck “Enable advanced printing features” in the print driver.