« Posts under Linux

ESX 4.0: Post-Install Script

Sure there are better ways to mass deploy ESX servers, but this way will save the one off farm deployment person some time 🙂 I took liberties in assuming you would be able to fill in the blanks for variables so <VARIABLE> or _VARIABLE_ will need to be replaced ad-lib style. Just for you my friend, served up proper on a hyper-link plate….. esx4_postinstall

BIG-IP: Load Balancer Upgrade

I had the pleasure of doing an F5 BIG-IP load balancer upgrade recently and am happy with the way the F5 people have designed their systems for fail over. Essentially you will use different system partitions to host different versions of their product and you change which one you want to boot to after updating the inactive partition. This, theoretically, means you can always go back to a working configuration if something goes awry. I’m unhappy with how fragmented their documentation is in getting from point A to point B though. Here is a quick rundown of what I had to do…

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IPblock on Headless Ubuntu 9.04 Server

It was about time for me to upgrade my aging home Linux server and reinstall torrentflux-b4t with ipblock (among other things). I went back to my old post on what I did previously and found everything to be similar but slightly off. To do this reconfiguration and make ipblock work without the java user interface I had to tweak things a bit and compile another deb package. Below is how I recall doing this.

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CentOS/Redhat 5.x Post-Install Script

I whipped up a post install script to run on our new linux servers that drastically reduced the amount of manual effort involved with post-deployment configuration. I’m sure this could some how be integrated into the kick deployment. In any case, this script helps setup your sudo users, snmp services, and some other basic things. Modify to your environment and run directly after deployment on your headless linux servers. Save the script and change to .sh and run with sh ./centos-postinsatll.sh at a command prompt. Cheers!


CentOS/Redhat 5.x Kickstart Deployment

Not too long ago I was tasked with deploying a decent number of CentOS 5.3 and Redhat servers to BL490 blades and VMs in our datacenter (part of a massive environment deployment with HP C7000 enclosures, virtual connect, and a lot of patience). I hate manual configuration so I figured now is as good of time as any to get on the kickstart bandwagon. Here is how I did it:
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GNS3 on Ubuntu 8.04 – Migrating Your Install

Don’t have much time due to work obligations but I wanted to quickly drop this one out there for any who have followed my install guides. I was always ragging on and on about making the install somewhat portable by putting it into the /opt/ directory and now I’ll give a good example why.

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Ubuntu Server 8.04 Post Install Tip #4: Setup SMART

Setup SMART Disk Monitoring

If your disk is going bad no one going to tell you about it until you start hearing it. And if you start hearing issues with your drive it may be too late to backup your data or do anything else you need to do to not be driveless. I’m uncertain why some of this is not available as an install option for more distros but a good warning before the storm can save your data and your sanity.

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Ubuntu Server 8.04 Post Install Tip #3: Blacklist Modules

Here is another one that you may find useful to do after a default install of probably any Linux server, Disabling extra stuff from loading at startup. Ubuntu loads a ton of them and many I do not use at all. Since when do you need joystick or sound support on a server anyway? Anyways, here are some I disable and how I disable them.
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Ubuntu Server 8.04 Post Install Tip #1: Auto Updating

On a headless server that you have at home or for testing I like to make sure that all security updates and trivial updates are done automatically. A good sys admin will shy away from this practice for a good reason, updates can mess things up. In a production environment or where the server setup is very complex I can understand the need to manually run updates. For me, well I’m lazy when it comes to my home machines and generally don’t have too complex of setups. Also, in my experience, I’ve hardly ever seen an apt security or trivial update cause any harm (desktop linux I have seen issues though). That being said, I like to force security and trivial updates to happen daily.
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GNS3 on Ubuntu 8.04 – Choosing and Using your IOS

As promised here is the post regarding choosing and using an IOS image that will fit your study needs.

If you followed the first post in this series you are technically now ready to start loading up images and making labs of your own. You will need to get your hands on some IOS images (legally of course).But which IOS should you use?
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