tag:blogger.com,1999:blog-2815756525014037886.post5041302981839094492..comments2011-07-09T18:17:18.749-07:00Comments on aprendiendo Unix-Linux : Probando RAM con MD5sumTomas Bradanovichttp://www.blogger.com/profile/07908152821168871868noreply@blogger.comBlogger11125tag:blogger.com,1999:blog-2815756525014037886.post-64963648731819581962011-07-09T18:17:18.749-07:002011-07-09T18:17:18.749-07:00Excelente observación Felipe, no había tomado en c...Excelente observación Felipe, no había tomado en cuenta el tamaño del buffer y que hacía cálculo sucesivos por bloques, ¡Gracias!Tomas Bradanovichttps://www.blogger.com/profile/07908152821168871868noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-73973995358298446172011-07-09T18:05:59.229-07:002011-07-09T18:05:59.229-07:00http://www.koders.com/c/fid3D64E21C0E09F5D6216C4E4...http://www.koders.com/c/fid3D64E21C0E09F5D6216C4E4B1BB933AA6C6A9EB4.aspx<br />Linea 312<br /><br />y<br /><br />http://www.netlib.org/crc/md5sum.c<br /><br />En ambas implementaciones de md5sum se utiliza un buffer de a lo mas dos paginas de memoria (en general x86 usa paginas de 4K), lo unico que hace es leer un bloque del archivo y calcular su md5 basado en el contenido del bloque y el md5 del bloque anterior hasta que los bloques se acaben. En resumen, md5sum lee y escribe repetidamente en un buffer muy pequeño por lo que la efectividad de esta herramienta para detectar regiones anomalas es minima. No me cabe duda que te haya funcionado, pero no significa que sea recomendable. Hasta es mas efectivo abrir y guardar sucesivamente un archivo con GimpFelipe Astrozahttps://www.blogger.com/profile/03409839299720235173noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-27474512661921976232008-04-06T08:50:00.000-07:002008-04-06T08:50:00.000-07:00Lucio, any hour is OK, I am at home most part of t...Lucio, any hour is OK, I am at home most part of the day. <BR/><BR/>Eduardo, lo malo del memtest es que demora muchísimo, el MD5sum acusa un error en muy poco tiempoTomas Bradanovichttps://www.blogger.com/profile/07908152821168871868noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-91568832958971228082008-04-05T20:18:00.000-07:002008-04-05T20:18:00.000-07:00La mejor manera de probar una memoria ram es utili...La mejor manera de probar una memoria ram es utilizando el software memtest, hace distintas pruebas de memoria.<BR/>esta presente en varios cd de instalacion como gentoo y ubuntu.<BR/><BR/>Saludosedoherrerahttps://www.blogger.com/profile/06808922961496139497noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-10811330159517124652008-04-05T13:20:00.000-07:002008-04-05T13:20:00.000-07:00What's the best time to call you?What's the best time to call you?Rimskyhttps://www.blogger.com/profile/15941037942627932727noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-47281403378316128382008-04-05T13:14:00.000-07:002008-04-05T13:14:00.000-07:00Ok Linux, you have to try it. There are lot of myt...Ok Linux, you have to try it. There are lot of mythology around Linux, the best is to try and decide for yourself. <BR/><BR/>A couple of weeks for tax declaration! here in Chile it takes 5 minutes or so, the chilean Tax Service calculates a proposal for you online and if you agree just have to click OK, that`s all. This is the advantage of a simple tax structure.<BR/><BR/>Yea, I feel quite unconfortable talking by phone, but you can call me or mail me anytime, no problem, my land number is (56)(58)314191Tomas Bradanovichttps://www.blogger.com/profile/07908152821168871868noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-70201450892277232502008-04-05T12:21:00.000-07:002008-04-05T12:21:00.000-07:00Tom, the idea for me is not to use anything above ...Tom, the idea for me is not to use anything above Windows 2000. As a matter of fact, my favorite OS is Win98SE. I’ll see how far I get with a Linux system. If I retire, I won’t be needing many of the Windows based applications I use now. It will probably be most Internet and media for me after that. For now, I’ll have to leave this Linux project aside for a couple of weeks because I’m working on doing my income tax return, which in my case is kind of complicated.<BR/><BR/>BTW, I read that you don’t like to talk on the phone, but if you have a landline (home phone), I can call you in talk (in Spanish) about this stuff and the possibility of going to Arica.Rimskyhttps://www.blogger.com/profile/15941037942627932727noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-48363869575329652732008-04-05T11:08:00.000-07:002008-04-05T11:08:00.000-07:00If you are worried about security (trojans, pishin...If you are worried about security (trojans, pishing and such) probably is more simple to install a clean XP in a virtual machine and use it only for transfers and security related issues. Windows XP is as secure as Linux for desktop use provided you dont use email or download programs. A virtual box allow you keep a "clean box" inside your regular Windows.<BR/><BR/>The last Ubuntu version (you must always install the last) is the 7.10 "gutsy gibbon". You may have no problem with Internet or MAC Adress if you are using the same machine, because Linux uses the same LAN card and the same MAC, anyway in the upper corner running Ubuntu appear the network icon, click there to check the satte of connection. If all seems to be OK (no errors) and you have no connection, is a typical MAC problem, if you are connected trough a modem you may try with "clone MAC address" option, or ask your provider to register the aditional MAC.<BR/><BR/>To use linux in a virtual box has several advantages, specially for those of us who use mainly Windows apps, you may run Linux in a virtual box just as if where any other app, in a "window" no need of dual boot, partotion of hard disk and the GRUB mess (the start up manager), is far better for those who are not willing to sacrifice the normal Windows apps looking for the Linux equivalent.Tomas Bradanovichttps://www.blogger.com/profile/07908152821168871868noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-15049137189338767972008-04-05T10:39:00.000-07:002008-04-05T10:39:00.000-07:00Hi, Tom.I never used anything but Windows until no...Hi, Tom.<BR/><BR/>I never used anything but Windows until now, but since I’m planning to go to South America and need to do banking transactions over the Internet, I’m trying to get something more secure than Windows. It seems that Obuntu is pretty good, so I’m trying to get into it. I downloaded the .iso file to burn the installation CD, and the site that had the instructions on how to deal with Ubuntu recommended that the .iso file should be checked with MD5 for integrity. I was having a little trouble finding the right version, and by chance, I found it on your blog when I was looking for general info on Ubuntu.<BR/><BR/>I burned the installation CD, and I’m running Ubuntu from it. I’m having trouble getting on the Internet because my ISP works with specific MAC addresses, so I need to install it on the hard drive to change it to the right one because the file for the MAC address can’t be edited on the CD.<BR/><BR/>What advantage do you see in running Linux on a virtual machine?Rimskyhttps://www.blogger.com/profile/15941037942627932727noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-7617740627038191752008-04-05T10:02:00.000-07:002008-04-05T10:02:00.000-07:00Hello LucioI assume you want md5sum for Windows, y...Hello Lucio<BR/><BR/>I assume you want md5sum for Windows, you can download it from http://etree.org/md5com.html<BR/>There are several places where to download for free look "md5sum windows donload"<BR/><BR/>In Linux md5sum is included in the OS. Anyway if you have 2 GB RAM or such I reccomend you install Linux in a virtual machine.Tomas Bradanovichttps://www.blogger.com/profile/07908152821168871868noreply@blogger.comtag:blogger.com,1999:blog-2815756525014037886.post-63871389290096869902008-04-05T09:56:00.000-07:002008-04-05T09:56:00.000-07:00Hi, Tom.I’m glad I decided to look into your page ...Hi, Tom.<BR/><BR/>I’m glad I decided to look into your page about Ubuntu. I decided to give it a try and need the MD5Sum algorithm to check the integrity of the .iso file I downloaded.<BR/><BR/>I’ve been running Unbuntu from the installation CD to give it try.<BR/><BR/>LDRimskyhttps://www.blogger.com/profile/15941037942627932727noreply@blogger.com