Drilling a six inch hole


This is how I decided to drill a six inch hole into two blocks of wood.


The drill bit doesn’t go far enough nor does the throw of the press reach far enough, either. I need to drill the holes clamped a d then unclamp them and finish the depth of the holes in the second block.

Your passwords are at risk

Your website and email passwords might have been captured. Your website sessions can be impersonated because cookies can be captured. If you haven’t heard about this the last few days, this is a real uproar on the Internet.

I’ve spent the last two days listening to podcast after podcast describing the technical details of the computer programming flaw that allows attackers slurp unprotected memory from websites, Tor nodes, and IMAP email servers. Thousands of websites have patched their web servers but millions more email and web servers are going to be slow to patch their services.

Go install Lastpass. Use it’s Security Report feature. Create new passwords for sites that have fixed themselves against the Heartbleed bug.

Linux friendly JBOD controller? (Not LSI!)

I am refurbishing my ZFS on Linux backup box. It is an Asus/A2 motherboard chipset and runs slow but happily on two 3 four port sata controllers in a addition to all its server onboard sata ports. One of those sata crontrollers is on the PCI slot which will never run as fast. I can measure the difference watching the drives in iostat.

I picked up a likely pair of 8-port SAS controllers off ebay thinking I could get some PCIe-x8 action going. Unfortunately, I had to learn my lessons about LSI Megaraid, the MegaSAS 2008 controller… What a farce! These cards only want to run in HW raid mode and they entirely block bootup by obscuring the onboard SATA controller. (Who wants them?)

But clearly, I need some advice on a good JBOD HBA, or a raid card that won’t kill the budget. Is the SuperMicro AOP controller going to be a better choice? http://tinyurl.com/ohcy5t4 ? Or will Dell PERC H310 controllers http://tinyurl.com/pncuuem do the job?

I don’t want to reformat the drives of course, I would just like them to run consistently faster.

Fixing SSH login long delay


I use all of these tricks when setting up my own ssh servers.

Originally posted on In just five minutes...:

For a long time I had a problem with ssh login on a Redhat 6 server – it was taking too long to connect to it, around 30 seconds. Normally it hasn’t been a big issue – after all, you connect once and work for all day as long as you enable server keepalive packets to avoid session timeout.

However when it comes to work with SFTP o GIT it might become annoying. Everytime you sFTP upload or  git push you have to wait 30 seconds again.

This kind of problems are often related to DNS issues but this is not always the case. Following are the most common solutions:

1. Disable reverse IP resolution on SSH server

It turns out there is a setting in OpenSSH that controls whether SSHd should not only resolve remote host names but also check whether the resolved host names map back to remote…

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Setup DNS Server step by step in CentOS 6.3/6.4/6.5 / RHEL 6.3/6.4/6.5 / Scientific Linux 6.3/6.4/6.5


Always good to have a nice reminder on how to configure a DNS service!

Originally posted on Ostechnix:

DNS (Domain Name System) is the core component of network infrastructure. The DNS service resolves hostname into ip address and vice versa. For example if we type http://www.ostechnix.com in browser, the DNS server translates the domain name into its corresponding ip address. So it makes us easy to remember the domain names instead of its ip address.

DNS Server Installation in CentOS 6.5

This how-to tutorial will show you how to install and configure Primary and Secondary DNS server. The steps provided here were tested in CentOS 6.5 32 bit edition, but it should work in RHEL 6.x(x stands for version) and Scientific Linux 6.x too.


Here are my test setup scenario

[A] Primary(Master) DNS Server Details:

Operating System     : CentOS 6.5 32 bit (Minimal Server)
Hostname             : masterdns.ostechnix.com
IP Address           :

[B] Secondary(Slave) DNS…

View original 1,878 more words