Dentarg's TechBlog / Knowledge Base

All modern raid controllers comes with nice graphics interfaces, but this tools needs time to setup and resources to run (most of them are java based). But all LSI controllers (almost in every modern IBM x series or Fujitsu TX, RX series) got nice console tool to manage them (amCLI). It's even easier to set up mail alerts with this tool than with GUI, but manual for amCLI is rather lame.

LMHash is algorithm to encrypt password in some MS windows versions. Almost every administrator knows that LMhash is not safe way to keep paswords, but some ppl still use it especially for backwards compatibility. I would call it stupidity, but you can call it however you want.
There are tons of tools over the internet to extract those hashes from windows machines, from ldap databases and so on.

I've bought intel atom mobo 2 days ago, cause my home server have been consuming too much power.
My plan was to save some bucks and not to struggle too much in performance.
I've bought second hand intel D510MO (cause new atom mobos are too expensive) for 58$ with shipping.
I was a bit sceptical about atom performance, because of my experience with Asus EeePC 901.

This is rather a memo for me than real article, cause there are a lot of tutorials about growing raid.
I grow soft raid on average every 6 months, so I tend to forget all the necessary steps.

This time I've grown my 3TB raid5 to 4.5TB raid5 adding 1 disk to raid set under Ubuntu 10.04.

First thing after installing new disk in the computer is copying partition table from one of raid disks to new one. Sfdisk is the best tool to do this.

sfdisk -d /dev/sda > sda.part
sfdisk -f /dev/sdd < sda.part


Some organizations/companies got problem with keeping their passwords to sensitive systems safe.
I mean passowrds for privileged users (root, admin, etc.). Even small companies got big IT infrastructures with 10+ devices/systems which got administrative passwords (like servers, switches, databases, etc.). You use those accounts like ones half year, so it's hard to remember all those passwords (and users) combinations.