Questions and Answers
Category: Uncategorized |
Establishing the Amazon Kindle as a Tool
The biggest problem when a device goes mainstream is determining where it fits into your life. First off, don’t compare it to the Apple iPad. It is not for entertainment unless you find entertainment in literature, which some people still do. The Kindle was developed to distribute and consume documents, not to update your status, not to view pictures of your friend’s kids, and not to keep up with the Joneses. It is a tool to disseminate knowledge and information in a readable way, much like books. Let me ask you this: Can a calculator do any of these things?
With that said, the Kindle does its job beautifully. I spend a lot of time reading on it, whether to my daughter, or on my own. This is where the device excels.
You no longer have to go to the bookstore (Time Saving)
There are some people that enjoy perusing a bookstore for hours on end to find that one special book that meets their needs. I am not one of them. The more specific your desired knowledge in a brick and mortar, the harder it becomes to find exactly what you want or need. I’ve spent countless hours traveling from store to store looking for specific titles that bookstores do not carry because I’ve dug too deep. I read some pretty technical books that are borderline manuals. This type of specific need is not cost effective for a store to market to when the latest 8 dollar paperback sells a million copies. With the Kindle, I can search, or find the manual online and push it over Whispernet. This makes it easier for the store and myself.
Document distribution
This is an area that still needs to be developed to its full potential, but I am going to start looking for the code to do so. What I want is the ability to push reports about my home network automatically to my kindle every morning to know what is going on with it. If I am running out of space because I uploaded too many photos, I want to know. I want a weather report specific to my home pushed to my Kindle every morning. I want to know if the batteries are low in my camera and cell phone before I leave the house in the morning. To summarize, I want an electronic nag to prevent the surprises that often occur when you start using electronics in your home.
Reading
I am a reader of Historical literature. I love learning about Ireland, a place I would like to visit sometime. I read The Magic Treehouse to my child. She loves it, despite the fact that TV doesn’t think History is cool enough for kids. Go figure, use a device for its original purpose and you get enjoyment out of it. This is something I feel has been lost in our modern days of mods, hacks, and apps.
I am going to continue to develop this category with information about using the Kindle for everyday purposes, but I will try to remain practical and within the needs it was targeted for.
Category: Kindle |
IRC is back online!
Category: Uncategorized |
FCC Versus Comcast (i.e. Take that, Comcast, Part 2)
Category: Uncategorized |
dmidecode
NAME
dmidecode – DMI table decoder
SYNOPSIS
dmidecode [OPTIONS]
DESCRIPTION
dmidecode is a tool for dumping a computer’s DMI (some say SMBIOS) table contents in a human-readable format. This table contains a descrip
tion of the system’s hardware components, as well as other useful
pieces of information such as serial numbers and BIOS revision. Thanks
to this table, you can retrieve this information without having to
probe for the actual hardware. While this is a good point in terms of
report speed and safeness, this also makes the presented information
possibly unreliable.
The DMI table doesn’t only describe what the system is currently made
of, it also can report the possible evolutions (such as the fastest
supported CPU or the maximal amount of memory supported).
SMBIOS stands for System Management BIOS, while DMI stands for Desktop
Management Interface. Both standards are tightly related and developed
by the DMTF (Desktop Management Task Force).
As you run it, dmidecode will try to locate the DMI table. If it suc
ceeds, it will then parse this table and display a list of records like
this one:
Handle 0×0002, DMI type 2, 8 bytes. Base Board Information
Manufacturer: Intel
Product Name: C440GX+
Version: 727281-001
Serial Number: INCY92700942
Each record has:
A handle. This is a unique identifier, which allows records to refer
ence each other. For example, processor records usually reference
cache memory records using their handles.
A type. The SMBIOS specification defines different types of elements
a computer can be made of. In this example, the type is 2, which
means that the record contains “Base Board Information”.
A size. Each record has a 4-byte header (2 for the handle, 1 for the
type, 1 for the size), the rest is used by the record data. This
value doesn’t take text strings into account (these are placed at the
end of the record), so the actual length of the record may be (and is
often) greater than the displayed value.
Decoded values. The information presented of course depends on the
type of record. Here, we learn about the board’s manufacturer, model,
version and serial number.
OPTIONS
-d, –dev-mem FILE
Read memory from device FILE (default: /dev/mem)
-q, –quiet
Be less verbose. Unknown, inactive and OEM-specific entries are
not displayed. Meta-data and handle references are hidden. Mutu
ally exclusive with –dump.
-s, –string KEYWORD
Only display the value of the DMI string identified by KEYWORD.
KEYWORD must be a keyword from the following list: bios-vendor,
bios-version, bios-release-date, system-manufacturer, system-
product-name, system-version, system-serial-number, system-uuid,
baseboard-manufacturer, baseboard-product-name, baseboard-ver
sion, baseboard-serial-number, baseboard-asset-tag, chassis-man
ufacturer, chassis-type, chassis-version, chassis-serial-number,
chassis-asset-tag, processor-family, processor-manufacturer,
processor-version, processor-frequency. Each keyword corre
sponds to a given DMI type and a given offset within this entry
type. Not all strings may be meaningful or even defined on all
systems. Some keywords may return more than one result on some
systems (e.g. processor-version on a multi-processor system).
If KEYWORD is not provided or not valid, a list of all valid
keywords is printed and dmidecode exits with an error. This
option cannot be used more than once, and implies –quiet.
Mutually exclusive with –type and –dump.
-t, –type TYPE
Only display the entries of type TYPE. TYPE can be either a DMI
type number, or a comma-separated list of type numbers, or a
keyword from the following list: bios, system, baseboard, chas
sis, processor, memory, cache, connector, slot. Refer to the DMI
TYPES section below for details. If this option is used more
than once, the set of displayed entries will be the union of all
the given types. If TYPE is not provided or not valid, a list
of all valid keywords is printed and dmidecode exits with an
error. Mutually exclusive with –string.
-u, –dump
Do not decode the entries, dump their contents as hexadecimal
instead. Note that this is still a text output, no binary data
will be thrown upon you. The strings attached to each entry are
displayed as both hexadecimal and ASCII. This option is mainly
useful for debugging. Mutually exclusive with –quiet and
–string.
-h, –help
Display usage information and exit
-V, –version
Display the version and exit
DMI TYPES
The SMBIOS specification defines the following DMI types:
Type Information
0 BIOS
1 System
2 Base Board
3 Chassis
4 Processor
5 Memory Controller
6 Memory Module
7 Cache
8 Port Connector
9 System Slots
10 On Board Devices
11 OEM Strings
12 System Configuration Options
13 BIOS Language
14 Group Associations
15 System Event Log
16 Physical Memory Array
17 Memory Device
18 32-bit Memory Error
19 Memory Array Mapped Address
20 Memory Device Mapped Address
21 Built-in Pointing Device
22 Portable Battery
23 System Reset
24 Hardware Security
25 System Power Controls
26 Voltage Probe
27 Cooling Device
28 Temperature Probe
29 Electrical Current Probe
30 Out-of-band Remote Access
31 Boot Integrity Services
32 System Boot
33 64-bit Memory Error
34 Management Device
35 Management Device Component
36 Management Device Threshold Data
37 Memory Channel
38 IPMI Device
39 Power Supply
Additionally, type 126 is used for disabled entries and type 127 is an
end-of-table marker. Types 128 to 255 are for OEM-specific data.
dmidecode will display these entries by default, but it can only decode
them when the vendors have contributed documentation or code for them.
Keywords can be used instead of type numbers with –type. Each keyword
is equivalent to a list of type numbers:
Keyword Types
bios 0, 13
system 1, 12, 15, 23, 32
baseboard 2, 10
chassis 3
processor 4
memory 5, 6, 16, 17
cache 7
connector 8
slot 9
Keywords are matched case-insensitively. The following command lines
are equivalent:
dmidecode –type 0 –type 13
dmidecode –type 0,13
dmidecode –type bios
dmidecode –type BIOS
FILES
/dev/mem
BUGS
More often than not, information contained in the DMI tables is inaccu
rate, incomplete or simply wrong.
AUTHORS
Alan Cox, Jean Delvare
SEE ALSO
biosdecode(8), mem(4), ownership(8), vpddecode(8)
dmidecode February 2007 DMIDECODE(8)
Category: Favorite Commands |
PXE Environments
Environmental Benefits
Is this a green solution? It can be if you take into consideration of adding smaller, low-power devices to your network instead of full-blown computers. Two companies I can recommend for the clients are Diskless Workstations and devonIT. The noise reduction factors switching to diskless clients can be amazing. Another option that may have some green factor to it is using that older machine that is sitting in your basement or garage (we all have them) instead of throwing it away. Keep an eye on power consumption if you choose to use older equipment, though.
Centralization Benefits
If you have several independent computers, problems quickly develop. Files become scattered over every machine you touch. Where was that brilliant resume you sent out last month that got such positive response? These random files require an intensely complex backup routine and will be difficult to track. The problem of having different versions of files also comes into play. By keeping it all on one server, you are making things much simpler.
Time Benefits
You spend what seems like countless hours updating your systems with the same fixes over and over if you don’t “go thin”. While it is commendable to treat each system with individual attention and know each system, do you really want to spend all your free time updating? This goes along the lines of centralization, but there is a time benefit when you have only one server to upgrade.
Cost Benefits
Thin Clients are much cheaper. You can expect approximately 350-500 dollars per machine for decent hardware. Configured correctly, the performance of these machines can rival high-end $1000+computers. Touching back on the centralization, some cloud computing backup providers and backup application vendors charge you per computer. It makes so much more sense to have one backup target.
These are the benefits that have made me come to the conclusion to create a PXE environment. I will, of course, move slowly and make sure all the steps are done properly, but the advantages have out weighed other factors at this point.
Category: Uncategorized |
Grappling for a Logo
Logo 1: I want to avoid the whole Matrix clone thing, but the Matrix was cool...
Logo 2: Trying to keep it simple with this one. We all know how we love our acronymns.
Category: Uncategorized |
Documentation that always comes in handy
During a traffic audit, it becomes very critical to know exactly what you are looking at. I often refer to this document. A very important consideration to those new to the field: IANA does not enforce these assignments. They are only here to be the official registry. Just because you see a specific port being used, doesn’t absolutley mean that port is carrying it’s assigned traffic. Worms will often use well-known ports to disguise themselves. Rule of thumb: always analyze the packets, don’t just assume based on the port.
The Ubuntu Forums are very valuable as a reference tool. It always helps to read an entire thread before implementing things, due to the assistanceit provides being user-generated content. It saved numerous reinstalls when I first started using Ubuntu.
When I went searching for this site, I was guided to a link informing me that all documentation would be merged to the support site. Clicking on that link, directed me to a redirect to the “New” support site. (kind of Monty Python-ish, I know). Regardless of where it is and what it is called, Cisco has stellar documentation for IOS and all of their products online for brushing up on your skills.
This is the place I go as a darkhorse search of last result for information about open source troubleshooting. It’s not due to a lack of information or quality. Linux Forums has been around for 10+ years and I remember using it intensly to learn about Red Hat and Mandrake Linux. It is still a high traffic site and if I have a question regarding RPM-based distributions, I will still frequent it. The usual warning about reading an entire thread applies here as well. Become an expert, not just someone looking for a quick fix.
The name says it all with this one. Debian has a strong library of resources to learn how to implement solutions and resolve problems in this distribution.
This is the default place I look for domain owner information. It is always handy to have access to this in a situation where your customers are using third party services that provide specialized solutions.
Do you have any suggestions for any other sites that help make your day as an IT Admin? Please feel free to suggest your own favorites in the comments section.
Category: Uncategorized |
Remaining Analytical: Avoiding the pitfalls of feature-driven decisions
Results oriented methodology is taking over our small little world. Users and managers are no longer amazed by bells and whistles. They need technology, but not in the feature-driven approach that worked ten years ago. Potential of a product is not as important as fullfilling immediate needs. The features have to take care of everyday issues, not something they will experience when they are the big dog on the block. Reporting is very important. Success of products from salesforce.com, Siebel, Remedy, and Oracle have paved the way for a great deal of accountability with regards to the employee-employer relationship and the Information Technology department is no longer immune. Utilization is a strong requirement with limited budgets.
What can be done to adjust to the cycle we are currently in? There are many ways to thrive.
- Remain focused on your client’s needs. The sharper the image you have in your mind the better. Don’t make guesses regarding what will help day to day. Learn about problems, document them and focus on solutions that will address immediate needs.
- Document everything: Keep personal records of what you accomplish and notice in your day to day interactions. This is not to share with others, but to research and revisit as discussions arise.
- Do NOT under any circumstances suggest products that do not meet the needs of a project and proceed to belittle the problems management is concerned about. The problem with saying “My way or the highway!” is there are so many choices of highway right now.
- Know that like any other economic cycle, this will eventually give way to brighter days. This is very important with regards to attitude. The last thing any organization wants or needs right now is a grumpy technologist.
- Focus on sustainability and making things run to their full potential.
With these thoughts in mind, remaining analytical will be a lot easier. After all, we are more scientist than salesperson.
Category: Guides |
The Road Towards Good Backups: Mile One
A heart-to-heart may be needed with management and ultimately the people you support. Environments that have a long standing history of doing it themselves will have a hard time with being told how and where to save their files, and there will even be some people that have a workable system. The key is to get as many people on board as possible. Let them participate in the filing system planning to prove to them you have their and the company’s needs in mind. When you are new to a network, always be sure to perform a rundown of all user accounts to make sure all home drives have been provided and are mapped correctly. The last thing you want is to have your customers question sincerity because they are feeling overlooked.
Running a quick check of applications running on the network and the drawbacks of forcing that data onto a shared drive can also reduce the number of backup targets.
The solution in regards to data consolidation will vary based on your environment and this makes complete sense. Each organization will have it’s individual needs, but it is very important to address this issue to ensure a cost effective backup system.
Category: Disaster Recovery |