Roger Hosto
Articles
Writing about databases, infrastructure, and whatever else comes up.
Jul 21, 2015 · System Administration
Disable 70-persistent-net.rules generation on CentOS 6 VM
If you're like me you probably have an environment that is running on some virtual platform and like everyone else you have built a template to spin Linux systems. One …
Oct 1, 2013 · System Administration
Work Blog: Managing Your Linux Deployments with Spacewalk
I have been using Spacewalk for a while now and really like a lot of the built-in functionality. I have been using it to build out and manage a lot …
Aug 20, 2013 · System Administration
CentOS 6.4 service virt-who won't start - work around
Here is the problem. [root@bob ~]# service virt-who start Démarrage de virt-who : Traceback (most recent call last): File "/usr/share/virt-who/virt-who.py", line 33, in <module> from subscriptionmanager import SubscriptionManager, SubscriptionManagerError File …
Nov 18, 2011 · System Administration
Using Iozone for Filesystem Benchmarking
If you have been around computer systems long enough everyone knows how import disk performance is, espeacially with database systems. There's the standard htparm -tT and dd test the everyone …
Jun 21, 2011 · System Administration
Using CURL to manage Tomcat
The other day I and a few of my colleges were talking about a easy way to deploy and undeploy war files from the command line like you could through …
Sep 14, 2009 · System Administration
Finding the HBA WWN on RHEL 5.x
Nice and easy one line command. shell> cat /sys/class/scsi_host/host*/device/fc*/port_name
Aug 27, 2009 · System Administration
Reinstalling the Boot Loader on RHEL
In many cases, the GRUB boot loader can mistakenly be deleted, corrupted, or replaced by other operating systems. The following steps detail the process on how GRUB is reinstalled on …
Aug 24, 2009 · System Administration
Cloud computing
Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet. Cloud computing can be confused with: grid …
Aug 15, 2009 · System Administration
Unfreezing media in Netbackup on Solaris.
Here is something you don’t use everyday or at least I don’t. 🙂 First find the frozen media IDs. shell>/usr/openv/netbackup/bin/goodies/available_media | grep FROZEN A00060 HCART3 TLD 1 37 – 1 …
Aug 2, 2009 · System Administration
Configuring YUM to use a Proxy Server.
There are two basic ways that you can configure YUM to use a proxy server. First is by editing the yum.conf file pop over to this web-site. The yum.conf is …