The new Centrino Duo platform includes new Core 2 Duo processors, a new chipset with a faster front-side bus and an optional dedicated memory cache, a new graphics solution with a larger allocation of memory, and a new wireless card with support for Draft-N wireless. Centrino Pro has all the features from the Centrino Duo Read more about Centrino Duo – “Santa Rosa” Quick Facts[…]
In order to have anything put into a shared directory inherit the permissions of the shared directory, you need to run “chmod -R 2775 /path/to/share” with the “/path/to/share” being the folder that is shared in Samba. The 2 in the 2775 designates the “inherit” option. One reason that you may need to do this would Read more about Samba Inherited Permissions[…]
To install Apache, MySQL, and PHP on Ubuntu, we use the following command on one line: sudo apt-get install apache2 php5 libapache2-mod-php5 mysql-server mysql-admin libapache2-mod-auth-mysql php5-mysql phpmyadmin
I just ran into a problem with a process that was running in Windows that I couldn’t kill, even as an administrator. I happened to remember hearing about a “Windows XP Privilage Escalation Exploit” which in reality, isn’t exactly an exploit. The idea is that you can gain SYSTEM level rights, which are higher than Read more about Windows Privilage Escalation[…]
The 419 fraud (after a formerly relevant section of the Criminal Code of Nigeria) is a form of advance fee fraud. It is a confidence trick in which the target is persuaded to advance relatively small sums of money in the hope of realizing a much larger gain. In brief, 419 is a sub-classification of Read more about 419 Fraud[…]
PCI Express is based on a serial protocol, which means that the interface can use a very small number of connectors. In doing so, the PCIe connections are clocked faster than the parallel busses (PCI, AGP) in order to obtain a high bandwidth. The bandwidth can be multiplied by merging several PCI Express lanes. The Read more about PCIe Basics[…]
How I got TwinView to work in Ubuntu. This only works with the binary Nvidia drivers. Beryl does work. First I made a backup of my /etc/X11/xorg.conf file just in case something got messed up. Then I edited /etc/X11/xorg.conf and found the “Device” section. I added the following lines below the “Driver” line: Option “TwinView” Read more about TwinView: Ubuntu Howto[…]
When using a 32bit processor, the maximum memory that you can have in your machine is 4GB. Well, that isn’t totally true, because there are hacks to make your machine able to use more, but I won’t get too much into that. To come up with the 4GB of maximum addressable memory, you need only to Read more about Why can’t I use all of my 4GB of RAM?[…]
Screen is a command that will allow you to log in to a command terminal, start something running (compiling or such) and sever the connection, only to be able to come back to it later and find that the application that you had running is still running. For the example, I will show me compiling Read more about Linux Screen[…]
If you create a user in Linux and want that user to be able to access SMB shares, you must do the following: $ sudo smbpasswd -a This will ask you to type in your password (unless you are already sudoed) and then it will ask for the new SMB Password. Type it twice and Read more about Using SaMBa in Linux[…]
I got word of this story today. It is unfortunate, but this kind of thing happens all the time (literally hundreds of incidents), especially with a certain company. In fact, when we were running Tech Rescue full time, a few years ago, over 60% of our client list had used the company described below. They Read more about Stay away from the the little VW Bugs![…]
FTP 21 Telnet 23 SMTP 25 DNS 53 TFTP 69 Finger 79 HTTP 80 POP3 110 NNTP 119 SNMP 161 MySQL 3306 Microsoft SQL Server 1433 Terminal Services 3389 AIM 5190 PCAnyWhere 5631, 5632 VNC 5800, 5801, 5900, 5901 X Windows 6000 IRC 6667
T1 1.544 mb 24 POTs Lines T3 43.232 mb 28 T1s OC3 155 mb 100 T1s OC12 622 mb 4 OC3s 400 T1s OC48 2.5 gb 4 OC12s 1600 T1s OC192 9.6 gb 4 OC48s 6400 T1s
RAID 0 is also known as a Striped Set without parity, it is a kind of RAID half-breed. It features one of the most well known processes in RAID devices: striping. Striping comes in many forms and it can be understood loosely as this: Using several hard drives connected to a controller, the hard drive Read more about RAID 0[…]
RAID 1 is also known as Disk Mirroring. You have two or more disks, and you mirror the contents of one onto the other. With 100% data redundancy, very little restoration of data on a single disk failure is necessary. You can copy the files from its mirrored drive to the replacement drive. If you Read more about RAID 1[…]
With RAID level 2, data correction occurs in real-time via an implementation of Error Correcting Code, or ECC for short. If one disk were to crash in a RAID 2 configuration, there would be no interruption in service. Using parity, a single missing disk is “reconstructed” on the fly. RAID 2 uses a very specific Read more about RAID 2[…]
Like RAID 2, RAID 3 is not supported under Windows Server. In addition, RAID 3 reserves the dedicated parity-disk model for active recovery. But RAID 3 bests RAID 2 by moving up to byte-level data striping (8 bits in a byte), and switching to a more effective ECC scheme. XOR is the shortened version of Read more about RAID 3[…]
RAID 5 performance is all about the RAID controller. Depending on implementation and the controller in use, it can offer a data read transaction rate as formidable as any RAID level, an impressive write transaction rate, and an excellent aggregate transfer rate. What it offers that RAID 0 doesn’t is security. By ideal design, only Read more about RAID 5[…]
This level is implemented as a striped array whose segments are mirrored as RAID 1 arrays. RAID 1+0, get it? RAID 10 shares the same fault tolerance as RAID 1 (mirror), but gives fault tolerance with a striping mechanism that can yield very high read rates. Functionally, the array can perform read transactions on par Read more about RAID 10 (1+0)[…]
Once I meet someone new and they find out that I am a computer consultant, or if I haven’t seen someone in a while, I have been inevitably getting asked if I would recommend Windows Vista. I have been testing it out for a few months now and while I generally like it okay, I Read more about A View on Windows Vista[…]
419 Scam Information The 419 fraud (after a formerly relevant section of the Criminal Code of Nigeria) is a form of advance fee fraud. It is a confidence trick in which the target is persuaded to advance relatively small sums of money in the hope of realizing a much larger gain. In brief, 419 is Read more about 419 Scam Information[…]
To use Mac OS 9-compatible applications in the Classic environment you must have a Mac OS 9 System Folder. Out of the box, some Macintosh computers manufactured after June 2004 do not have Classic pre-installed, including iMac G5, Mac mini, and some Power Macintosh G5 computers. Classic is available on one of the Apple software Read more about Getting Classic to work on OSX without OS9 installed[…]
Spyware and viruses could start using an old Unix trick. Recent viral applications allow viruses and spyware to use the kernel rootkit concept to hide themselves from the Windows operating system and the users that administer them. For more information, take a look at the following articles: The Inquirer Computer World
We have been getting a question from some of our clients that are still using dialup. How does that “high-speed dialup” work, and would it be worth it for me to get? This article will explain how it works and will hopefully allow the reader to make a better decision. First of all, when your Read more about How it Works: Highspeed Dialup[…]
A recent problem with a Qmail server had our Linux technicians scratching their heads a bit. The server would accept a message to be sent from an account on that box, but it would take about 30 minutes to actually send the message to the recipient. This is what we found: ————————————————————————————- After scouring the Read more about Qmail waits 30 minutes before processing a message[…]
With today’s prevalance for spyware and worms, one of our technicians wrote up a small document on how to combat these problems. Internet Explorer is a bad choice for web browsing. It has many security holes that allow programs like spyware to run just by visiting a website. Many times, the user doesn’t even know Read more about Ways to Combat Spyware[…]