Tag Archives: CentOS

Upgrade CentOS 6.3 to CentOS 6.4

Check the packages that will be updated:

yum list update

Pull the trigger:

yum update


yum clean all
yum update glibc* yum* rpm* python*
yum update

Restart the system after update get completed


Check the version:

cat /etc/redhat-release
CentOS release 6.4 (Final)

Backup all important data before upgrading:

  • Backup /etc diretory
  • Backup important logs /var/log
  • Backup web server configs and sites
  • Dump MySQL databases
  • Dump PostgreSQL databases
  • Backup all what you need if something goes wrong
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CentOS 6.3 Yum Repos Returning Error 404

If you do a ‘yum install whateverpackage‘ or ‘yum update‘ and get something like:

http://centos.aol.com/6.3/updates/x86_64/repodata/c89405afba739f4b38b01e84b44e4b986ad6f93-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404"
Trying other mirror.
http://mirror.umd.edu/centos/6.3/updates/x86_64/repodata/c89405afba739f4b38b01e84b44e4b986ad6f93-filelists.sqlite.bz2: [Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 404"

Try this and see if it fixed it:

yum clean all
yum update
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