Posted on 2012/01/09 11:49
Filed Under OS/redhat

어느덧 벌써... RHEL 5.8 Beta 버전이 DownLoad 리스트에 올라왔다.

5.8 Release Notes – http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5-Beta/html-single/5.8_Release_Notes/index.html

5.8 Technical Notes – http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5-Beta/html-single/5.8_Technical_Notes/index.html

RHN ID 를 가지고 있는 사용자라면 RHEL 5.8 Beta 버전도 DownLoad 받을 수 있다.


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2012/01/09 11:49 2012/01/09 11:49
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Posted on 2012/01/06 09:22
Filed Under OS/redhat

관련 내용 : https://access.redhat.com/kb/docs/DOC-65906 ( RHN ID 필요 )

Broadcom BCM5709 모델에서 NIC 사용률이 많아지면  link down 되면서 아래와 같은 메시지를 출력 한다.

kernel: NETDEV WATCHDOG: eth0: transmit timed out

kernel: bnx2: eth0 NIC Copper Link is Down



시스템 환경 :
  • Red Hat Enterprise Linux 5.4
  • kernel-2.6.18-164.2.1.el5-x86_64
  • Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet

해결 방법 :

#vi /etc/modprobe.conf

options bnx2 disable_msi=1  <== 추가 
위 내용 적용 후 모듈을 재시작 하거나 시스템을 재시작 한다.

또는

RHEL 5.5 로 커널을 업그래이드 한다. ( bnx2 driver ver. 2.0.2 )

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2012/01/06 09:22 2012/01/06 09:22
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Posted on 2011/12/12 11:06
Filed Under OS/redhat

대부분 상용 솔루션들은 30 Days 정도의 시험 평가판을 제공한다.

해당 테스트 제품을 사용해 보고 문제가 없다고 판단 될 경우 정식 제품을 구입하는 프로세스다.

간혹... 리눅스 플렛폼 개발을 페도라에서(CentOS 에서 하면 그나마...ㅠㅠ) 하고 RHEL 제품군에서 포팅을 시도하는 경우가 생긴다...

고객의 질문 내용...

GLIBC 버전이 달라요... , 어떤 어떤 패키지 버전이 달라요...

이런 문제의 원인은 보통... 폐도라(기타 배포판)를 사용하여 개발 후... RHEL 에 포팅 하려고 할때 나오는 질문들이다.

이런경우 페도라 보다는 RHEL or Red Hat Product  Evaluation Version DownLoad 하여 테스트 혹은 개발 하길 권장 한다.

Red Hat Evaluation Version DownLoad Site : https://access.redhat.com/downloads/evals

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2011/12/12 11:06 2011/12/12 11:06
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Posted on 2011/12/12 10:58
Filed Under OS/redhat

RHEL4 버전이 2012년 초반에 지원이 종료된다.

Red Hat Enterprise Linux 4

생산 3 종료 정규 라이프사이클 종료 – 2012년 2월 29일

RHEL4 버전을 사용 하면서 지속적인 Update 를 진행하는 고객들은 RHEL5 로 새로 설치를 진행 하거나 ELS 서브스크립션 를 별도로 구입 하여야 합니다.

RHEL Life Cycle : https://access.redhat.com/support/policy/updates/errata/


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2011/12/12 10:58 2011/12/12 10:58
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Posted on 2011/12/12 10:36
Filed Under OS/redhat

Red Hat Enterprise Linux 6 update 2 가 릴리즈 되었습니다.

관련 내용 :

link : http://www.redhat.com/about/news/prarchive/2011/first-anniversary-of-red-hat-enterprise-linux-6

RHEL 6.2 에서 눈에 띄는점은

LVM RAID support

In Red Hat Enterprise
Linux 6.2, support for MD’s RAID personalities has been added to LVM as a Technology Preview. The following basic features are available: create, display, rename, use, and remove RAID logical volumes. Automated fault
tolerance is not yet available.
It is possible to create RAID
logical volumes by specifying the —type <segtype> argument. The
following are a few examples:
Create a RAID1 array (this is a different implementation of RAID1 than LVM’s mirror segment type):
]# lvcreate —type raid1 -m 1 -L 1G -n my_lv my_vg
Create a RAID5 array (3 stripes + 1 implicit parity):
# lvcreate —type raid5 -i 3 -L 1G -n my_lv my_vg
Create a RAID6 array (3 stripes + 2 implicit parity):
~]# lvcreate —type raid6 -i 3 -L 1G -n my_lv my_vg


Component Versions

This appendix is a list of components and their versions in the Red Hat Enterprise Linux 6.2 release.
Table A.1. Component Versions
Component

Version

Kernel

2.6.32-202

QLogic qla2xxx driver

8.03.07.05.06.2-k

QLogic qla2xxx firmware

ql23xx-firmware-3.03.27-3.1
ql2100-firmware-1.19.38-3.1
ql2200-firmware-2.02.08-3.1
ql2400-firmware-5.06.01-1
ql2500-firmware-5.06.01-1

Emulex lpfc driver

8.3.5.45.2p

iSCSI initiator utils

6.2.0.872-27

DM-Multipath

0.4.9-43

LVM

2.02.87-3

X Server

1.10.4-3

RHEL 6.2 release note : https://access.redhat.com/knowledge/docs/Red_Hat_Enterprise_Linux/

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2011/12/12 10:36 2011/12/12 10:36
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Posted on 2011/11/25 18:24
Filed Under OS/redhat

RHEL6 버전에선 /proc/cpuinfo 내용을 GUI 형태로 확인 가능하다.

#lstopo

사용자 삽입 이미지


^^ 오늘 처음 알았다...


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2011/11/25 18:24 2011/11/25 18:24
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Posted on 2011/08/16 15:04
Filed Under OS/redhat

Original Link : http://magazine.redhat.com/2007/01/29/why-do-i-get-tcp-treason-uncloaked-messages-in-my-system-logs/

Why do I get “TCP: Treason uncloaked!” messages in my system logs?
by The editorial team

Symptoms:
This message is getting recorded in the /var/log/messages file:

TCP: Treason uncloaked! Peer 62.49.179.198:25/27430 shrinks window
3672986867:3672989475. Repaired.

Reason:

This is just an informative message. It is not a problem with the system. The message is informing the system administrator that a remote system is not able to communicate correctly with the system in question. It is a problem on the remote system. It indicates that the system in question has received packets with incorrect TCP information. It is caused by a remote host, or intermediate firewall/NAT getting TCP behavior incorrectly. In the usual cases, the only likely impact is a little performance drop on the connection.

contributed by David Robinson

Red Hat’s customer service and support teams receive technical support questions from users all over the world. Red Hat technicians add the questions and answers to Red Hat Knowledgebase on a daily basis. Access to Red Hat Knowledgebase is free. Every month, Red Hat Magazine offers a preview into the Red Hat Knowledgebase by highlighting some of the most recent entries.

This entry was posted by The editorial team on Monday, January 29th, 2007 at 12:06 pm and is filed under tips and tricks. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

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2011/08/16 15:04 2011/08/16 15:04
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Posted on 2011/08/12 16:47
Filed Under OS/redhat

link : https://access.redhat.com/kb/docs/DOC-57803

Issue

    * Is it possible to customise the disk layout of the server during the text mode install?
    * After installation is completed anaconda creates the root partition as /dev/mapper/VolGroup-lv_root and a similar partition for swap.

Environment

    * Red Hat Enterprise Linux 6

Resolution

    * In text mode installation anaconda does not allow customizing the partitioning layout. The text mode has been significantly streamlined and many options have been removed. Please see the following link : http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Migration_Planning_Guide/ch02s03.html

    * This mode asks only a minimal set of questions to install the OS. To customize something, use the GUI installer (through VNC if necessary) or kickstart.

Root Cause

    * In the default layout, the text mode install creates two logical volumes, lv_root and lv_swap.
    * Instead of using the text mode,  use the VNC mode, to get the graphical installation and customize the layout as per the requirements. When text mode is chosen, the installer will ask to either start the vnc server or continue with text mode.

    * Kickstart can also be used to do the partitioning. Use system-config-kickstart and generate the kickstart file. The kickstart options are documented here : http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-kickstart2-options.html
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2011/08/12 16:47 2011/08/12 16:47
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Posted on 2011/07/25 16:35
Filed Under OS/redhat

이번에도 조금 늦었지만...

트위터에 리트윗 했으니 볼 사람은 봤겠지...

RHEL 5.7 이 릴리즈 되었습니다.

관련 내용 : http://www.redhat.com/about/news/blog/Red-Hat-Enterprise-Linux-5-7-Now-Available

릴리즈 노트 : http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html-single/5.7_Release_Notes/index.html

다운 로드 : https://rhn.redhat.com/rhn/software/downloads/SupportedISOs.do



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2011/07/25 16:35 2011/07/25 16:35
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Posted on 2011/06/28 09:43
Filed Under OS/redhat

xeon 7500 series(boxboro-EX) 에서 지원하는 RHEL 버전은 무엇일까???

Which versions of Red Hat Enterprise Linux support the Intel® Xeon® processor 7500 series-based Platform (Boxboro-EX)?


The Intel® Xeon® processor 7500 series-based platform (Boxboro-EX) is supported as of Red Hat Enterprise Linux 5.4 with RHSA-2009-1670-1. This Red Hat Enterprise Linux errata includes the minimal set of changes required for Red Hat hardware certification of the reference platforms.



OEM systems that diverge significantly from the Intel reference platform – in design, peripherals, or BIOS – may require Red Hat Enterprise Linux 5.5 for certification. Please check Red Hat's Hardware Catalog at

https://hardware.redhat.com for the certification status of specific OEM systems and models.



Red Hat Enterprise Linux 5.5 will provide more complete support of the new Intel® Xeon® processor 7500 series-based platform hardware. In addition, Red Hat Enterprise Linux 6.0 will take even greater advantage of the more advanced reliability, availability, and serviceability (RAS) features -- as well as even greater scalability and  performance capabilities -- of the new hardware. Although some Intel® Xeon® processor 7500 series-based platform systems are certified and supported with the Red Hat Enterprise Linux 5.4 plus RHSA-2009-1670-1, Red Hat recommends using Red Hat Enterprise Linux 5.5 wherever possible in order to ensure an even better customer experience.



The Intel® Xeon® processor 7500 series-based platform supported as of RHEL 5.4 with RHSA-2009-1670-1 includes the following chipsets:

    Intel® Xeon® processor 7500 series
    Intel® Xeon® processor 6500 series
    Intel® 7500 Chipset
    Intel® 7500 Scalable Memory Buffer


link : https://access.redhat.com/kb/docs/DOC-28841
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2011/06/28 09:43 2011/06/28 09:43
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