[CentOS-es] KVM P2V
Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. -- Este mensaje no contiene virus, porque ha sido creado con Linux, utilizando Software Libre y auditable. This message doesn't contain viruses, because it has been created with Linux, using auditable Free Software. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
[CentOS-es] OpenLDAP
Hola tengo un servidor Centos 5.7 con OpenLDAP, para autenticacion de usuarios, el problema radica en que veo que las cuentas se pueden loggear tantas veces ellos quieran, es decir un misma cuenta se usa para ingresos en computadoras cliente distintas, y lo que requiero es que no hagan eso, si no que si alguien se loggea con su cuenta esta ya no pueda ser usada en ningun equipo. y obligar a las otras personas a entrar con su propia cuenta de usuario. Saludos ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basisty javier.basi...@gmail.comescribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es -- Este mensaje no contiene virus, porque ha sido creado con Linux, utilizando Software Libre y auditable. This message doesn't contain viruses, because it has been created with Linux, using auditable Free Software. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
qemu-img create imagen_del_disco.img -f raw 20G Crea una imagen estatica de 20 GB, para ver los distintos posibles formatos tenes el man del comando qemu-img qemu-kvm -hda imagen_del_disco.img -cdrom /path/al/iso.iso -m 1024 -boot dc -net nic -net tap -daemonize Inicia la maquina virtual con el disco de 20GB y utiliza la iso del centos como cdrom, tiene 1gb de memoria, la parte de red es para que la uses con un bridge ethernet, eso es otro tema, sino podes obviarla y salir nateado del anfitrion. Con esa base podes empezar fijate que hay mil configuraciones posibles, cantidad de procesadores disponibles como coreduo, core2duo, etc... cantidad de nucleos Ahi tenes un buen descriptivo de la parte de red... http://people.gnome.org/~markmc/qemu-networking.html On 01/26/2012 03:44 PM, Carlos Andres Torres Paredes wrote: Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basistyjavier.basi...@gmail.comescribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
Gracias por la información, con estos comandos lo que entiendo es que son para crear una maquina virtual nueva con centos, lo que quiero hacer y si es posible pasar todo un servidor físico a uno virtual y no se si es fácil realizarlo con KVM. El 26 de enero de 2012 14:08, Javier Basisty javier.basi...@gmail.comescribió: qemu-img create imagen_del_disco.img -f raw 20G Crea una imagen estatica de 20 GB, para ver los distintos posibles formatos tenes el man del comando qemu-img qemu-kvm -hda imagen_del_disco.img -cdrom /path/al/iso.iso -m 1024 -boot dc -net nic -net tap -daemonize Inicia la maquina virtual con el disco de 20GB y utiliza la iso del centos como cdrom, tiene 1gb de memoria, la parte de red es para que la uses con un bridge ethernet, eso es otro tema, sino podes obviarla y salir nateado del anfitrion. Con esa base podes empezar fijate que hay mil configuraciones posibles, cantidad de procesadores disponibles como coreduo, core2duo, etc... cantidad de nucleos Ahi tenes un buen descriptivo de la parte de red... http://people.gnome.org/~markmc/qemu-networking.html On 01/26/2012 03:44 PM, Carlos Andres Torres Paredes wrote: Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basistyjavier.basi...@gmail.com escribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es -- Este mensaje no contiene virus, porque ha sido creado con Linux, utilizando Software Libre y auditable. This message doesn't contain viruses, because it has been created with Linux, using auditable Free Software. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
Lee mejor, lo que haces es iniciar con el centos en modo rescue para preparar a la virtual para recibir toda la info del otro server. Si te complica mucho esa parte lo que podes hacer es usar el disco del server real y usarlo directamente con KVM y te ahorras toda la parte de migrar. On 01/26/2012 05:11 PM, Carlos Andres Torres Paredes wrote: Gracias por la información, con estos comandos lo que entiendo es que son para crear una maquina virtual nueva con centos, lo que quiero hacer y si es posible pasar todo un servidor físico a uno virtual y no se si es fácil realizarlo con KVM. El 26 de enero de 2012 14:08, Javier Basistyjavier.basi...@gmail.comescribió: qemu-img create imagen_del_disco.img -f raw 20G Crea una imagen estatica de 20 GB, para ver los distintos posibles formatos tenes el man del comando qemu-img qemu-kvm -hda imagen_del_disco.img -cdrom /path/al/iso.iso -m 1024 -boot dc -net nic -net tap -daemonize Inicia la maquina virtual con el disco de 20GB y utiliza la iso del centos como cdrom, tiene 1gb de memoria, la parte de red es para que la uses con un bridge ethernet, eso es otro tema, sino podes obviarla y salir nateado del anfitrion. Con esa base podes empezar fijate que hay mil configuraciones posibles, cantidad de procesadores disponibles como coreduo, core2duo, etc... cantidad de nucleos Ahi tenes un buen descriptivo de la parte de red... http://people.gnome.org/~markmc/qemu-networking.html On 01/26/2012 03:44 PM, Carlos Andres Torres Paredes wrote: Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basistyjavier.basi...@gmail.com escribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
On 01/26/2012 03:11 PM, Carlos Andres Torres Paredes wrote: Gracias por la información, con estos comandos lo que entiendo es que son para crear una maquina virtual nueva con centos, lo que quiero hacer y si es posible pasar todo un servidor físico a uno virtual y no se si es fácil realizarlo con KVM. sí se puede! recuerdo haberle visto una herramienta para migrar de un server físico a uno virtual, pero no le tengo en mente, luego en la noche me pongo a buscarle y te digo si le encuentro ok? 73 de hc6ep El 26 de enero de 2012 14:08, Javier Basisty javier.basi...@gmail.comescribió: qemu-img create imagen_del_disco.img -f raw 20G Crea una imagen estatica de 20 GB, para ver los distintos posibles formatos tenes el man del comando qemu-img qemu-kvm -hda imagen_del_disco.img -cdrom /path/al/iso.iso -m 1024 -boot dc -net nic -net tap -daemonize Inicia la maquina virtual con el disco de 20GB y utiliza la iso del centos como cdrom, tiene 1gb de memoria, la parte de red es para que la uses con un bridge ethernet, eso es otro tema, sino podes obviarla y salir nateado del anfitrion. Con esa base podes empezar fijate que hay mil configuraciones posibles, cantidad de procesadores disponibles como coreduo, core2duo, etc... cantidad de nucleos Ahi tenes un buen descriptivo de la parte de red... http://people.gnome.org/~markmc/qemu-networking.html On 01/26/2012 03:44 PM, Carlos Andres Torres Paredes wrote: Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basistyjavier.basi...@gmail.com escribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
Saludos Lo que te dijo Javier Basisty es correcto y es la solucion que buscas para pasar una maquina fisica a una maquina virtual (P2V), necesitas buscar mejor hay mucha info en la red. http://www.josemariagonzalez.es/tag/rhev El 26/01/12 15:24, Ernesto Pérez Estévez escribió: On 01/26/2012 03:11 PM, Carlos Andres Torres Paredes wrote: Gracias por la información, con estos comandos lo que entiendo es que son para crear una maquina virtual nueva con centos, lo que quiero hacer y si es posible pasar todo un servidor físico a uno virtual y no se si es fácil realizarlo con KVM. sí se puede! recuerdo haberle visto una herramienta para migrar de un server físico a uno virtual, pero no le tengo en mente, luego en la noche me pongo a buscarle y te digo si le encuentro ok? 73 de hc6ep El 26 de enero de 2012 14:08, Javier Basistyjavier.basi...@gmail.comescribió: qemu-img create imagen_del_disco.img -f raw 20G Crea una imagen estatica de 20 GB, para ver los distintos posibles formatos tenes el man del comando qemu-img qemu-kvm -hda imagen_del_disco.img -cdrom /path/al/iso.iso -m 1024 -boot dc -net nic -net tap -daemonize Inicia la maquina virtual con el disco de 20GB y utiliza la iso del centos como cdrom, tiene 1gb de memoria, la parte de red es para que la uses con un bridge ethernet, eso es otro tema, sino podes obviarla y salir nateado del anfitrion. Con esa base podes empezar fijate que hay mil configuraciones posibles, cantidad de procesadores disponibles como coreduo, core2duo, etc... cantidad de nucleos Ahi tenes un buen descriptivo de la parte de red... http://people.gnome.org/~markmc/qemu-networking.html On 01/26/2012 03:44 PM, Carlos Andres Torres Paredes wrote: Gracias, no tengo conocimientos de configuración en KVM, he usado VMware player y VirtualBox OSE. Si es posible los pasos uno a uno agradecería mucho. El 26 de enero de 2012 12:59, Javier Basistyjavier.basi...@gmail.com escribió: La forma mas facil de hacer eso es usar rzync. La virtual la inicias en modo rescate, particionas el disco a piaccere y montas las particiones dentro de un arbol de directorios estandar. Despues en el sistema a migrar creas un directorio X por ejemplo /X y montas todo el raiz ahi dentro con -bind, osea mount -bind / /X. Esto si tenes una sola particion, ti tuvieses varias deberias montar cada una en el lugar que le corresponde en /X. Con -bind evitas montar todos los procs y demas cosas q no hace falta migrar. el rsync seria asi: en la virtual: cd /arbol_de_directorios_con_todo_montado rsync -avz r...@ip.del.server.real:/X/* ./ Cuando terminas la sincro, chrooteas a /arbol_de_directorios_con_todo_montado y reconstruis el initrd y listo. Proceso que he utilizado mas de 1000 veces durante los ultimos 5 años. Contame como te fue! Saludos Javier Basisty On 01/26/2012 01:21 PM, Carlos Andres Torres Paredes wrote: Buen día: He estado buscando información de como pasar de un servidor con sistema operativo Centos 5.7 a una maquina virtual, ya tengo como servidor host para las virtualizaciones y en otro servidor con sistema operativo Centos 6.2 e instalado KVM. Lo que he encontrado y que está mas o menos completo se encuentra en ingles, no me es muy claro para con el ingles. Quisiera saber de que forma se facilita o donde encuentro información para realizar esta mudanza de la forma mas fácil posible? De antemano agradezco la información suministrada. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
Re: [CentOS-es] KVM P2V
On 26/01/12 18:35, Daniel wrote: Saludos Lo que te dijo Javier Basisty es correcto y es la solucion que buscas para pasar una maquina fisica a una maquina virtual (P2V), necesitas buscar mejor hay mucha info en la red. http://www.josemariagonzalez.es/tag/rhev Holas... Lo que te puede llegar a servir es la documentación, y porque no también Proxmox VE. http://pve.proxmox.com/wiki/Main_Page --- LA DOCS http://www.proxmox.com/products/proxmox-ve --- LA PÁGINA DEL SISTEMA ADMIN DE VIRTUALES Hay mucha info de como pasar de una forma a otra... Saludos Rodolfo. ___ CentOS-es mailing list CentOS-es@centos.org http://lists.centos.org/mailman/listinfo/centos-es
[CentOS] Antwort: Re: HP ProLiant N40L
centos-boun...@centos.org schrieb am 25.01.2012 22:26:54: John R Pierce pie...@hogranch.com Gesendet von: centos-boun...@centos.org 25.01.2012 22:27 Bitte antworten an CentOS mailing list centos@centos.org An centos@centos.org Kopie Thema Re: [CentOS] HP ProLiant N40L On 01/25/12 1:02 PM, Jason T. Slack-Moehrle wrote: Have you tried to use 2 x 8gb DDR3 to get it to 16gb instead of the 8gb they say is max? if the mainboard chips don't support that configuration, its not going to work. That chip requires unbuffered DDR3, i don't even think there is such a thing as 8GB unbuffered. you find the 8gb dimms as registered memory for the higher end servers that use such. -- john r pierceN 37, W 122 santa cruz ca mid-left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Hi there, I don't know the exactly difference between the Models N36L and N40L. In a german forum has somebody 12 GB (8+4) in his N36L and it works. Gruß Andreas Reschke Unix/Linux-Administration andreas.resc...@behrgroup.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] [OT] Broken system practical tests
A while ago when doing my RHCE someone mentioned to me a rather nifty site that can randomly break a system in a variety of ways - useful for practical testing of a candidate. It was something like monkey test or something... Anyway as you can see my memory is failing me does this ring any bells with anyone? I'd like to give it a try for someone I'm interviewing in the next few days if anyone remembers a link... James ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [OT] Broken system practical tests
Okay found it... don't know where I had monkey from... For the record if useful for anyone else: http://trouble-maker.sourceforge.net/ James ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Antwort: Re: HP ProLiant N40L
From: Andreas Reschke andreas.resc...@behrgroup.com I don't know the exactly difference between the Models N36L and N40L. In a german forum has somebody 12 GB (8+4) in his N36L and it works. From the quickspecs: http://h18004.www1.hp.com/products/quickspecs/13716_na/13716_na.HTML AMD Athlon II Processor Model Neo N36L (1.30 GHz, 15W, 2MB) AMD Turion II Processor Model Neo N40L (1.50 GHz, 15W, 2MB) JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
From: Jason T. Slack-Moehrle slackmoeh...@gmail.com Here is where I draw some confusion. Where do items such as Varnish Cache, HAProxy go in relationship to firewall, DMZ, etc? Here, we use 2 keepalived/lvs servers in direct routing for HA, then n cache servers with nginx (for consistent hashing + some basic http/php) and, behind, varnish (or squid, not decided yet... varnish memory/disk handling seems cleaner and a little bit faster, but on the other hand squid cache will survive a restart (maybe varnish new version 3.x implemented it, not sure)). JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Antwort: Re: Antwort: Re: HP ProLiant N40L
centos-boun...@centos.org schrieb am 26.01.2012 11:33:27: John Doe jd...@yahoo.com Gesendet von: centos-boun...@centos.org 26.01.2012 11:33 Bitte antworten an CentOS mailing list centos@centos.org An CentOS mailing list centos@centos.org Kopie Thema Re: [CentOS] Antwort: Re: HP ProLiant N40L From: Andreas Reschke andreas.resc...@behrgroup.com I don't know the exactly difference between the Models N36L and N40L. In a german forum has somebody 12 GB (8+4) in his N36L and it works. From the quickspecs: http://h18004.www1.hp.com/products/quickspecs/13716_na/13716_na.HTML AMD Athlon II Processor Model Neo N36L (1.30 GHz, 15W, 2MB) AMD Turion II Processor Model Neo N40L (1.50 GHz, 15W, 2MB) JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Hi John, thanks for this info. I've running a N36L in SOHO with 6.2 and 4 KVM-Instances for a half year. BTW: There is N54L with 2,2GHz in a roadmap. Gruß Andreas Reschke Unix/Linux-Administration andreas.resc...@behrgroup.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Local privilege escalation bug in kernel
Hi Frank, Do we know if this bug affects Centos? http://www.techworld.com.au/article/413300/linux_vendors_rush_patch_privilege_escalation_flaw_after_root_exploits_emerge The article states that it affects kernel 2.6.39 and above, but since RH backports so much stuff I'm not sure if this would actually include the Centos kernels. I did a quick check using the 'mempodipper' demo exploit on CentOS 5.7 and CentOS 6.2. Currently it doesn't seem to affect either. On CentOS 5.7 it just hangs, on 6.2 it finishes without dropping me in a root shell. So at first sight it seems CentOS is not affected. Best regards, Peter. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] GUI login issues over NFS
I am at my wits end, googling, trying various things, and nothing seems to really solve my problem, so I thought I would break down and write to the community to see if anyone else has run into the issue and actually solved it. My environment of interest contains a mix of various Fedora and CentOS workstations that all participate in NIS for user authentication which then, upon a successful login, automount an NFS $HOME directory. And here is the rub, I am migrating that NFS back end FROM a Sun X4540 (which has been working flawlessly for the past few years) to an HP X9320 Ibrix system. I replicated my NFS exports from one system to the other, and have tested command line logins over SSH using NIS credentials and that all seems to work quite well. However, whenever a CentOS (or even Fedora for that matter) desktop user tries to log in (either Gnome or KDE) they are unable to successfully log in - and are presented with the nebulous .dmrc error as follows: User's $HOME/.dmrc file is being ignored. This prevents the default session and language from being saved. File should be owned by user and have 644 permissions. User's $HOME directory must be owned by user and not writeable by any other users. Followed promptly by Your session only lasted less than 10 seconds. If you have not logged out yourself this could mean that there is some installation problem or that you may be out of disk space. Try logging in with one of the failsafe sessions to see if you can fix this problem. Now I have, of course, checked the permissions and ownership of the $HOME directory and also the .dmrc file and they are correct - but no matter what I do, this fails. Things I have tried: with NIS turned on, without NIS turned on, using automount, without using automount, using all different kinds of NFS options passed to a local mount of the /ibrix/testing area which I am using to test GUI logins from the local workstation under Gnome or KDE - all to no avail. And of course I have spent countless hours/days googling and have even written to HP for some advice. I am pretty confident that perms/ownerships are correct, but I just cant seem to get anything to work. Has anyone run into a similar problem? Has anyone found a solution? Does anyone have any suggestions that I am not thinking about? I appreciate your time and assistance Michael Weiner === Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S.News World Report (2010). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On 26 January 2012 15:46, Weiner, Michael wein...@ccf.org wrote: I am at my wits end, googling, trying various things, and nothing seems to really solve my problem Hello, Check /var/log/audit/audit.log, maybe it's a Selinux related problem. Were you using Selinux on those Centos/Fedora installations previously? Maybe the contexts haven't been migrated over (properly). ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Behalf Of Lucian Check /var/log/audit/audit.log, maybe it's a Selinux related problem. Were you using Selinux on those Centos/Fedora installations previously? Maybe the contexts haven't been migrated over (properly). Thank you for your reply. I normally disable selinux, but its worth checking out :) Michael === Please consider the environment before printing this e-mail Cleveland Clinic is ranked one of the top hospitals in America by U.S.News World Report (2010). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] (OT): Horde initial SQL setup
On Jan 25, 2012, at 5:34 PM, Bill Campbell wrote: On Wed, Jan 25, 2012, Craig White wrote: On Jan 25, 2012, at 3:45 PM, Bill Campbell wrote: ... What I haven't been able to find are the sql script files to do the initial database creation that were present in older versions of horde, imp, kronolith, turba, etc. Don't quote me on this - you can probably get a better definitive answer from the horde mail list but I think the actual scripts are located in your PEAR directory (perhaps under Horde/Test) Of course you need to get into mysql and create a user for horde, create a database for horde and grant permissions to the horde user for the horde database and obviously configure that in horde/config/conf.php (which should be possible with the web configuration tool. That got me there. After digging around in the $prefix/bin/webmail-install script and grep'ing my way through the Horde directories, I figured out that I could rerun webmail-install script after creating the mysql database, user, and password, and all the appropriate tables were created. Now I need to look at the schema to see what's necessary in migrating an older horde/imp installation to this. the 'migration' of the db's should be done within the administration panel of Horde except if your previous version was too old. Craig ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
Hi John, Are you using Comcast in Santa Cruz? absolutely not.the local cable system blows. my home is on a sonic.net (http://sonic.net) ADSL circuit resold by another ISP. television is on satellite. I am looking at Sonic.net and I am awaiting a call from a sales rep (had been 2 days) They are offering a Business T for $308 per month and I also see they have the bonded They advertise the starting Business T at 1.5Mbps per second They advertise the ADSL2+ 2 lines at up to 40Mbps per second. Am I mis-understanding that the cost for a T seems high, but a better option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? -Jason ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/2012 05:09 PM, Jason T. Slack-Moehrle wrote: Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? have you considered taking your questions to the lopsa lists ? That would be far more topical ( or even to a local LUG list ) than the CentOS lists. -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh ICQ: 2522219| Yahoo IM: z00dax | Gtalk: z00dax GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
Hi Karanbir, Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? have you considered taking your questions to the lopsa lists ? That would be far more topical ( or even to a local LUG list ) than the CentOS lists. I have no idea what lopsa is, so let me look it up. I know my questions are surely off topic here. -Jason ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 5:46 AM, Weiner, Michael wein...@ccf.org wrote:
Has anyone run into a similar problem?
Different versions of NFS and automount over time and over platforms
requiring slightly different config tweaks - this problem is always
kicking my butt.
Any relevant messages in /var/log/messages of the server? Is automount
able to mount and it is just a permissions problem?
I had a vaguely similar problem recently, trying to get OSX to access
NIS/NFS, it needs different mount options in the automounter config.
You say you tried with automount turned off, were you able to mount
manually but not able to access? Same error message?
What does nsswitch.conf look like?
Generally my trouble shooting goes like this:
1) get NIS to work ('ypcat mymap' works)
2) mount NFS share manually with mount command and access as root
3) access NFS share as ordinary user
4) get automount to mount the share
HTH,
Dave
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 11:39:35AM -0500, Weiner, Michael wrote: On Behalf Of Lucian Check /var/log/audit/audit.log, maybe it's a Selinux related problem. Were you using Selinux on those Centos/Fedora installations previously? Maybe the contexts haven't been migrated over (properly). Thank you for your reply. I normally disable selinux, but its worth checking out :) snip lenghty signature no issue here on CentOS-6.2 2.6.32-220.4.1.el6.x86_64 selinux enforced (but I have setsebool -P use_nfs_home_dirs=1) ibrix:/ibfs1/tru mounted as /home/ibrix (newly created ibrix user) Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0xBEFA581B pgpn5zezJnKd0.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] sa-update error with perl
OK ... then it ought to move (probably) :) See my post on repoforge users list. http://lists.repoforge.org/pipermail/users/2012-January/022634.html There's no one to move the package but Dag. Per your suggestion, I filed a bug report on this, although that tracker seems like a lonely place. :) https://github.com/repoforge/repoforge.github.com/issues/2 FYI for the CentOS list, this issue has been resolved (perl-NetAddr-IP has been moved to the RepoForge extras repository). Yum no longer complains that perl-NetAddr-IP has to be updated and spamassassin does not produce errors. Thanks again ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 2:22 PM, Thomas Burns tbu...@hawaii.edu wrote:
Any relevant messages in /var/log/messages of the server? Is automount
able to mount and it is just a permissions problem?
I had a vaguely similar problem recently, trying to get OSX to access
NIS/NFS, it needs different mount options in the automounter config.
You say you tried with automount turned off, were you able to mount
manually but not able to access? Same error message?
What does nsswitch.conf look like?
Generally my trouble shooting goes like this:
1) get NIS to work ('ypcat mymap' works)
2) mount NFS share manually with mount command and access as root
3) access NFS share as ordinary user
4) get automount to mount the share
Thanks for your response Dave! I have been unable to find anything
relevant in the server syslogs. But here is what i have tried:
1) ypcat mymap gives me back what i would expect, as does a ypcat -k
passwd | grep myusername
2) I can mount the share manually on the workstation (using -o
nfsvers=3,rw,hard,intr options) and it mounts and i can traverse it as
a root user
3) I can mount the share manually on the workstation and i can
traverse it as root and as a local user
4) i can then put the map in place, restart autofs, log in via a NIS
account and it maps correctly and i can traverse it properly in a
shell (i.e. ssh, etc)
5) i tried mounting manually, creating a $home directory for a new
user, giving that user a password and i can ssh in but not Gnome or
KDE
6) variations of the above.
And this *IS* working currently on a Sun X4540 system, and the
NON-HOME directories that get mapped upon login correctly map on the
HP X9320 via NIS authentication just not X.
Thanks for the help and logical thinking.
Michael
___
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 2:28 PM, Tru Huynh t...@centos.org wrote: no issue here on CentOS-6.2 2.6.32-220.4.1.el6.x86_64 selinux enforced (but I have setsebool -P use_nfs_home_dirs=1) ibrix:/ibfs1/tru mounted as /home/ibrix (newly created ibrix user) Tru - Thank you for your response. When you created the NFS export on the IBRIX system, what options did you use? I am currently using its defaults of RW, NO_ROOT_SQUASH Thanks Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Confusion over sendmail and smtp auth on a 6.2 server
I'm reading a lot on how to setup my smtp auth on a new Centos 6.2 server. I want to use sendmail and have this running on a Centos 3 machine now, so it's not new stuff to me. Unfortunately, the more I read, the more confusion I seem to have. Firstly, how to generate my certificates. A good recommendation or howto would be in order. I think most of the confusion here comes from the commented names of files used in sendmail.mc for all the auth files. As far as I can tell, the encryption length is the only change I need (going to a minimum of 2048 bits) from the old system generation. Those pem files throw me a bit, though. Secondly, I'm reading DoveCot has a problem with security and that I need to run something other than ? (Cyrus, Courier, etc) to make this work. I typically don't run imap security, only on smtp, so I'm not sure if there's to be interference between the two. Since postfix is the default now on Centos 6.2, what should I look for by changing it back to sendmail when it comes to smtp auth? I only authenticate users that are not in the building on our network to allow them to send email. They're free to use pop or imap to retrieve their email without authentication. Thanks for any clarity on this. steve campbell ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 9:46 AM, Michael Weiner hun...@userfriendly.net wrote: 5) i tried mounting manually, creating a $home directory for a new user, giving that user a password and i can ssh in but not Gnome or KDE If it was me, I'd try creating a new home directory for that user on a disk local to the machine where you're trying to log in. Presumably the user could then log in. Then I'd check that the user could access the NFS share normally just not as home. If no problem there, I'd be a bit tempted to stop there as a workaround, because I am lazy and most of my users just use one machine. Seems possible to me that the dmrc file error message and the instant logout are related but not identical. Gnome just does not like NFS home dirs. (My experience has been, if the same user is logged in to two machines, kablooey!) I used to frequently see a similar problem, after a crash or other odd event, where the user could log in but then would immediately be logged out with an error similar to your second message. I had a magic trick I had to go through to untangle things, if you are desperate enough you could try it: * delete all files in the user's home dir that start with .gconf (.gconf and .gconfd). * delete all files in /tmp. * reboot to make sure all processes release old corrupted files. * if feeling paranoid, before having the user try to log in, check again as root that /tmp is empty and nothing in user's home dir is named .gconf*. One of the symptoms of my problem was, after the user tried to log in and failed, there would be some processes owned by that user alive or in zombie state but still part of ps output, although of course the user was not logged in. These must be killed (or overkilled with reboot) and all traces in /tmp removed. But this would show up in the log of the machine where user is trying to log in (if I recall) as some complaint about gconf. So this may be a goose chase for you, since KDE also fails. I'm not sure what (if anything) they would have in common. Oh well. Dave ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 3:40 PM, Thomas Burns tbu...@hawaii.edu wrote: If it was me, I'd try creating a new home directory for that user on a disk local to the machine where you're trying to log in. Presumably the user could then log in. Then I'd check that the user could access the NFS share normally just not as home. If no problem there, I'd be a bit tempted to stop there as a workaround, because I am lazy and most of my users just use one machine. I have tried this, but of course i did it as the users $HOME directory. The reason we do it this way is because we use that file server to then back up all environmental files and user data. This is currently working, and has been for years, on other hardware ... we just purchased the HP at the end of last year, and silly me thought i would just migrate everything over like i have time and time again :( Seems possible to me that the dmrc file error message and the instant logout are related but not identical. Gnome just does not like NFS home dirs. (My experience has been, if the same user is logged in to two machines, kablooey!) I used to frequently see a similar problem, after a crash or other odd event, where the user could log in but then would immediately be logged out with an error similar to your second message. I had a magic trick I had to go through to untangle things, if you are desperate enough you could try it: At this point i supposed i can try anything, this device is not in production yet for this purpose so i have some leeway and can play somewhat. * delete all files in the user's home dir that start with .gconf (.gconf and .gconfd). * delete all files in /tmp. * reboot to make sure all processes release old corrupted files. * if feeling paranoid, before having the user try to log in, check again as root that /tmp is empty and nothing in user's home dir is named .gconf*. I basically achieved this same thing by doing an 'adduser newuser' and providing it a password which then created the $HOME directory on the NFS mount, and then attempting to login to Gnome or KDE as that user to no avail - same error One of the symptoms of my problem was, after the user tried to log in and failed, there would be some processes owned by that user alive or in zombie state but still part of ps output, although of course the user was not logged in. These must be killed (or overkilled with reboot) and all traces in /tmp removed. But this would show up in the log of the machine where user is trying to log in (if I recall) as some complaint about gconf. So this may be a goose chase for you, since KDE also fails. I'm not sure what (if anything) they would have in common. Thanks for the suggestions on some other things to try. Michael ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 2:40 PM, Thomas Burns tbu...@hawaii.edu wrote: Gnome just does not like NFS home dirs. (My experience has been, if the same user is logged in to two machines, kablooey!) Gnome doesn't like multiple concurrent logins, period. For example, via the console and freenx as the same user. I've sometimes wondered if the authors ever saw a multi-headed unix system or used X remotely. But that doesn't really have much to do with the automount/nfs issue. -- Les Mikesell lesmikes...@gmail.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] GUI login issues over NFS
On Thu, Jan 26, 2012 at 3:55 PM, Les Mikesell lesmikes...@gmail.com wrote: Gnome doesn't like multiple concurrent logins, period. For example, via the console and freenx as the same user. I've sometimes wondered if the authors ever saw a multi-headed unix system or used X remotely. But that doesn't really have much to do with the automount/nfs issue. No, but it broke up my day, LOL Thanks! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/2012 09:09 AM, Jason T. Slack-Moehrle wrote: They advertise the starting Business T at 1.5Mbps per second They advertise the ADSL2+ 2 lines at up to 40Mbps per second. Am I mis-understanding that the cost for a T seems high, but a better option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. 1.5Mbps is not faster than 40Mbps. There's nothing hidden in the way they advertise speeds. DSL and DOCSIS technologies have advanced and matured over the last couple of decades. T1 has not. A T1 connection is the same now as it has always been. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
Hi Gordon. They advertise the starting Business T at 1.5Mbps per second They advertise the ADSL2+ 2 lines at up to 40Mbps per second. Am I mis-understanding that the cost for a T seems high, but a better option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. 1.5Mbps is not faster than 40Mbps. There's nothing hidden in the way they advertise speeds. DSL and DOCSIS technologies have advanced and matured over the last couple of decades. T1 has not. A T1 connection is the same now as it has always been. Your timing is perfect with this reply. I was just on the phone with Sonic.net and the rep told me that the T1 was better due to it being all my traffic and much more reliable. They told me that most companies buying internet for hosting their infrastructure internally are not happy with 40Mbps. With Comcast we currently have a 20 x 5 and they are offering us a 50 x 10 circuit for $123/month. -Jason ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. 1.5Mbps is not faster than 40Mbps. There's nothing hidden in the way they advertise speeds. DSL and DOCSIS technologies have advanced and matured over the last couple of decades. T1 has not. A T1 connection is the same now as it has always been. Not so much haven't matured but are capable of some other technologies besides internet access that the local CO could setup, like channelizing and different types of signaling, not to mention a dedicated circuit to the CO. I might compare SLA of the two. Might find a drastic difference. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/12 3:43 PM, Gordon Messmer wrote: Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. 1.5Mbps is not faster than 40Mbps. There's nothing hidden in the way they advertise speeds. DSL and DOCSIS technologies have advanced and matured over the last couple of decades. T1 has not. A T1 connection is the same now as it has always been. a modern T1 (aka DS0) is likely delivered to the end premises over HDSL using 2 pairs. while its slower than those consumer oriented technologies you mention, its far more reliable and has a guaranteed SLA (service level agreement) you won't get from DOCsis (cable) or end user ADSL, and tends to have very deterministic latencies... -- john r pierceN 37, W 122 santa cruz ca mid-left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/2012 03:43 PM, Gordon Messmer wrote: On 01/26/2012 09:09 AM, Jason T. Slack-Moehrle wrote: They advertise the starting Business T at 1.5Mbps per second They advertise the ADSL2+ 2 lines at up to 40Mbps per second. Am I mis-understanding that the cost for a T seems high, but a better option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. Yes they are indeed slow and reliable. That said, on the rare occasion they do go out, they get repaired quickly. This may not not be true in you case, but usually T1 lines are tariffed with guaranteed uptimes if you ask the right questions and read the fine print. I have had clients on DSL be down for a few days while the telco got a round tuit. There are two reasons T1 is more expensive. T1 requires 2 copper pairs in the cable. Those 2 pairs not available for voice traffic. The other reason is the uptime requirements. DSL, while faster, does not preclude using the pair for voice traffic, uses a single copper pair and has no uptime commitments. If T1 can meet your bandwidth needs and budget constraints, it could still be your best solution. The good news is, you get to decide. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/2012 03:57 PM, Ken godee wrote: Not so much haven't matured but are capable of some other technologies besides internet access that the local CO could setup, like channelizing and different types of signaling, not to mention a dedicated circuit to the CO. ...which they always have been. T1 *is* a mature technology, but it hasn't improved the way that DSL and DOCSIS have. I might compare SLA of the two. Might find a drastic difference. You might, but you can't count on it. SLAs tend to vary more by vendor than they do by wiring technology. In many areas, I can get Ethernet over copper for less money than a T1, with a greater connection speed and an equivalent SLA. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On Jan 26, 2012, at 4:59 PM, John R Pierce wrote: On 01/26/12 3:43 PM, Gordon Messmer wrote: Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. 1.5Mbps is not faster than 40Mbps. There's nothing hidden in the way they advertise speeds. DSL and DOCSIS technologies have advanced and matured over the last couple of decades. T1 has not. A T1 connection is the same now as it has always been. a modern T1 (aka DS0) is likely delivered to the end premises over HDSL using 2 pairs. while its slower than those consumer oriented technologies you mention, its far more reliable and has a guaranteed SLA (service level agreement) you won't get from DOCsis (cable) or end user ADSL, and tends to have very deterministic latencies... Wow, that's just ... wrong. There's nothing to mature in a T1. It's a telco transport standard that is well-known, and utilized everywhere as part of the Bell System standards for multiplexing and demultiplexing from smaller circuits to larger and back down. Ratified by the ITU for decades. T1 is a channelized synchronous telecommunications circuit type first designed in the late 60s, updated in the 70s. After removing framing bits, 1.544 Mb/s. DS0 is a sub-channel of a T1 when broken up into frames. Extended SuperFrame being the typical method these days. 24 of them at 64K per channel. HDSL is a completely different technology than T1. DOCSIS is the name of the standard utilized to deliver data services over a Cable Modem. ADSL is a single-pair high speed connection that's very distance limited from the origination point. SLA is a Service Level AGREEMENT. The key word being AGREEMENT. Your businesspeople are free to negotiate with any provider of ANY of the above technologies for anything they're willing to pay for. TYPICAL SLA's might be as stated above, but it's a contract... negotiate whatever you like. What you might want SLA's on when ordering IP bandwidth: - Maximum CONTINUOUS data rate upstream AND downstream simultaneously, and what thresholds are considered an OUTAGE on the SLA even if traffic is still flowing. - Latency from your end of the circuit to a known point will never EXCEED X amount or it will be considered an outage under your SLA. - Whether or not an UPSTREAM routing outage will be considered an SLA OUTAGE by your local carrier/ISP in terms of your bill. (In other words, how many backbone connections do they have and can they route around a problem, or are you stuck waiting for their one piddly edge router to be fixed in the case of fly-by-night providers.) - In the case of a cable cut, are trucks rolled 24/7, or only during business hours? Etc etc etc... there's more. Read up. SLA's are themselves a playground for lawyers and businesspeople to dicker over. Now the real world: - Any company relying on a single IP connection via a single route... is so far down the food chain they're not going to get service during a larger scale outage anyway. And... remember... - An SLA just gives you a refund of your money for the outage. It doesn't keep you in business if the service provider doesn't keep their side of the bargain. - If you have something that must be connected to the Internet 24/7 or you're out of business... buy more than one connection. An SLA won't matter at all when the backhoe cuts the only path out of your building. - Or... host it in a data center that has far more than one backbone connection via more than one physical route. Let's not mix all the technical details up with the business ones. That posting was the most misleading post I've read in quite a while, and shows a lot of the misconceptions out there. *** ANY of the above technologies can deliver a certain number of bits, at a certain latency, a certain direction, across a certain type of physical media, to some network at the other end. *** Whether that upstream provider has oversubscribed upstream connectivity, has latency issues, doesn't respond to fix their circuits in the middle of the night, pays you back for outages, scratches your back at the beach after signing that multi-million dollar bandwidth contract with giant SLA attached large enough to fund their entire fleet of trucks for a year... That's all up to the contract... ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On Thu, Jan 26, 2012, Raymond Lillard wrote: On 01/26/2012 03:43 PM, Gordon Messmer wrote: On 01/26/2012 09:09 AM, Jason T. Slack-Moehrle wrote: They advertise the starting Business T at 1.5Mbps per second They advertise the ADSL2+ 2 lines at up to 40Mbps per second. Am I mis-understanding that the cost for a T seems high, but a better option for me than getting their ADSL2+ service? I mean, is the T faster over all given it is all my traffic and I am not sharing? Can you explain a bit so I can develop a better understanding of how they advertise speeds, etc? Yes, the cost for a T1 will seem very high. It is antiquated telco tech. T1s are generally very reliable, but very very slow. Slow is relative. Our T1 is infinitly faster than a cable or DSL circuit when the power is out, which happens quite frequently here. Every time the Comcast/Xfinity folks come around trying to sell their services I note that when we had a week-long outage about 14 months ago, our generator kept the computers going, and USWorst's T1 never faltered. Comcast was down for that week, and another after the power came back up. Yes they are indeed slow and reliable. That said, on the rare occasion they do go out, they get repaired quickly. This may not not be true in you case, but usually T1 lines are tariffed with guaranteed uptimes if you ask the right questions and read the fine print. We are a bit more the 20,000 feet from the local CO, and have had a couple of occassions in the last 13 years where they have replaced the entire circuit when having problems with repeaters and such. For a while there were incidents where a telco tech buggered our T1 while trying to grab pairs in a terminal block for voice lines. I have had clients on DSL be down for a few days while the telco got a round tuit. Same here, even in commercial areas of Seattle where one would expect the infrastructure to be solid. There are two reasons T1 is more expensive. T1 requires 2 copper pairs in the cable. Those 2 pairs not available for voice traffic. The other reason is the uptime requirements. DSL, while faster, does not preclude using the pair for voice traffic, uses a single copper pair and has no uptime commitments. You can also share voice and data over a single T1. We have a couple of voice lines on our T1 which are split out with an Adtran channel bank that our provider supplies. I like this as it replaced the old Linux box we had with a (expensive) Sangoma card connecting to the T1. Another option which someone else mentioned is direct ethernet connections. We have a client in an industrial area of South Seattle that got that recently, and has been quite happy with it. Bill -- INTERNET: b...@celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax:(206) 232-9186 Skype: jwccsllc (206) 855-5792 Those who profess to favor freedom, and yet depreciate agitation, are men who want rain without thunder and lightning. They want the ocean without the roar of its many waters. -- Frederick Douglass ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/26/12 4:32 PM, Nate Duehr wrote: T1 is a channelized synchronous telecommunications circuit type first designed in the late 60s, updated in the 70s. After removing framing bits, 1.544 Mb/s. DS0 is a sub-channel of a T1 when broken up into frames. Extended SuperFrame being the typical method these days. 24 of them at 64K per channel. eek, I meant to say DS1 not DS0. Quite often these days, what people refer to as a T1 is in fact a DS1 delivered over HDSL. For all practical purposes, except the electrical signalling on the copper, the two services are equivalent, same speed, same framing. HDSL is self tuning, while classic T1 required the NIUs at each end to be tuned for the circuit, also HDSL requires fewer repeaters for longer distance circuits. -- john r pierceN 37, W 122 santa cruz ca mid-left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Can anyone talk infrastructure with me?
On 01/27/2012 12:14 AM, Raymond Lillard wrote: There are two reasons T1 is more expensive. T1 requires 2 copper pairs in the cable. Those 2 pairs not available for voice traffic. The other reason is the uptime requirements. the DSX or the old TX standard does not still deliver better performance, reliability or maintainability/manageability than a network cable plugged into the rack switch in a hosting facility. Also, with these sort of telco links in ( not consumer grade adsl etc ) one needs fairly expensive and hard to manage LTE kit. Then there is the p-o-f issues. In this day and age, building out a facility inhouse only makes sense if you have hundreds or more servers or need a facility that has no internet links ( very very few of those these days ) or you are a hosting company looking to build 30,000 odd sqft space to then lease out and are going to plumb in multi fibre inbound. Think about it - do you even want Inergen Canisters floating around a residential facility ? Halon 1301 ? Or are you going to put in a sprinker system and hope the insurance man does not test-run it and kill every bit of electric equipment you have on site. Just my 2bits. -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh ICQ: 2522219| Yahoo IM: z00dax | Gtalk: z00dax GnuPG Key : http://www.karan.org/publickey.asc ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] 6.2 install disk jumps to Gnome Partition Manager
Have you seen this problem? I downloaded CentOS-6.2-i386-bin-DVD1.iso verified the md5sum, wrote on a DVD, verified that against the iso. When I boot a computer with that disk, It does not present the usual Linux install menu, it jumps to a thing called Gnome Partition Manager, and that offers a weird sort of live disk interface. There is no way to start an install, so far as I can see. -- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Having problems with sudoers
On 01/25/2012 05:09 AM, Steve Campbell wrote: it's saying that sudo: sorry, you must have a tty to run sudo. I'm trying to enable the user apache to have the ability to run an executable from a web page. One of the common solutions is to do the following: Defaults:apache !requiretty apacheALL = NOPASSWD:/program.name Just had a look at this... I don't see a way to use sudo with SELinux enabled, so we have to assume that you've disabled it or set it to permissive. That'd be useful information to include. If you've done so, the next question would be whether your CGI is actually running as apache, or whether you've got it SUID to some other user. I've confirmed on my system that a simple CGI can run sudo with the following entries in sudoers: Defaults:apache !requiretty, visiblepw Cmnd_Alias ROUTER = /usr/local/bin/set-shorewall-gateway apache ALL=(ALL) NOPASSWD: ROUTER If it's not working for you, first run visudo, make a change to the file, then save and exit. If you have the syntax broken somewhere, visudo will tell you. If you don't get warnings, watch the logs while you try to use the web application: tail -f /var/log/messages /var/log/secure /var/log/httpd/error_log (or ssl_error_log) Include the log entries that you see in your reply. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
