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How to fix the “Cannot retrieve repository metadata (repomd.xml)” error in Fedora?

jason — Wed, 07 Dec 2011 04:12:20 +0000

The recently released Fedora 11(CentOS 5) Leonidas has some issues with it’s regular update process. Many users are getting a strange error which complains about the inability of the update system to retrieve the repository metadata, namely repomd.xml. You can see the error as attached in this inlet below:

Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again

When we tried to install Fedora 11(CentOS5) for the first time, we also faced a similar problem. A quick twitter search brought us to a conclusion that we were not… Read the rest

how to fix “mptctldrivers/message/fusion/mptctl.c::mptctl_ioctl”

jason — Wed, 07 Dec 2011 04:05:15 +0000

on a Dell PowerEdge 2950 I am using the Centos 5.x packages for x86_64 powered by the
OpenVZ kernels.
After the last update to the (as of Centos 5.2) latest kernel
2.6.18-92.1.1.el5.028stab057.2
I got alerted by the same kernel ERROR messages shown in the dmesg output:
….
Fusion MPT base driver 3.04.05
Copyright (c) 1999-2007 LSI Corporation
Fusion MPT misc device (ioctl) driver 3.04.05
mptctl: Registered with Fusion MPT base driver
mptctl: /dev/mptctl @ (major,minor=10,220)
mptctldrivers/message/fusion/mptctl.c::mptctl_ioctl() @596 – ioc0 not found!
mptctldrivers/message/fusion/mptctl.c::mptctl_ioctl() @596 – ioc1 not found! Read the rest

Install puppet on CentOS5 64Bit

jason — Thu, 01 Dec 2011 09:44:41 +0000

A puppet is an inanimate object or representational figure animated or manipulated by an entertainer, who is called a puppeteer. It is used in puppetry, a play or a presentation that is a very ancient form of theatre.

There are many different varieties of puppets, and they are made of a wide range of materials, depending on their form and intended use. They can be extremely complex or very simple in their construction. They may even be found objects. As Oscar Wilde wrote, “There are many advantages in puppets. They never argue. They have no… Read the rest

update Dell R410/R710 CentOS netcard driver

jason — Thu, 04 Aug 2011 03:19:06 +0000

view netcard driver version infomation:

[root@localhost DRIVER]# modinfo bnx2
filename: /lib/modules/2.6.18-164.el5/updates/bnx2.ko
version 2.0.2
license: GPL
desciption: Broadcom NetXtreme II BCM5706/5708/5709/5716 Driver

check netcard type

[root@localhost ~]# kudzu –probe –class=network
-
class: NETWORK
bus: PCI
detached: 0
device: eth0
driver: bnx2
desc: "Broadcom Corporation NetXtreme II BCM5716 Gigabit Ethernet"
network.hwaddr: 84:2b:2b:42:01:b1
vendorId: 14e4
deviceId: 163b
subVendorId: 1028
subDeviceId: 028c
pciType: 1
pcidom: 0
pcibus: 1
pcidev: 0
pcifn: 0

download new version driver from fllow url

http://www.broadcom.com/support/ethernet_nic/netxtremeii.php

Install… Read the rest

Install CentOS-5.5-X64 by network

jason — Fri, 01 Jul 2011 07:35:32 +0000

Principle:
No optical drive, floppy drive of a server, you want to install Linux. We need an agreement by the PXE network card guide after installing Linux. Process: the machine starts – the NIC boot – Obtain an IP address via DHCP – tftp get through the most basic core file, use the kernel file to start the machine – then you can start the installation configuration, choose to use http, ftp, nfs install remotely access needed packages.

Clearly, the network installation is to be configured with the server. Our server needs to provide the following services:

DHCP,TFTP,NFS(FTP,HTTP)

1.dhcp… Read the rest

update php5.1.6 to php5.3.x by yum on centos

jason — Wed, 22 Jun 2011 13:40:23 +0000

Installing PHP 5.2.x or 5.3.x on RedHat ES5, CentOS 5, etc

To install PHP 5.2.5 (Highest in repository at this time) you can make use of a RPM repository maintained by Remi.

1. download about software

wget http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-5.rpm

2. install

rpm -Uvh remi-release-5*.rpm epel-release-5*.rpm

3. update php

yum –enablerepo=remi update php

apt error:E: Dynamic MMap ran out of room of unbuntu

jason — Thu, 20 Jan 2011 04:29:47 +0000

Q: apt-get update error:apt error:

E: Dynamic MMap ran out of room.

how to resolve it.

A: It Is because the default buffer is too small,you can change it. edit /etc/apt/apt.conf

echo “APT::Cache-Limit "125000000";” >> /etc/apt/apt.conf

How do I view the information the process of IO to read and write on linux?

jason — Tue, 18 Jan 2011 09:42:15 +0000

Linux Kernel 2.6.20 kernel support for the process of more than IO statistics, can use such tools like iotop each process to monitor the situation on the IO operation, just as with the top real-time view process memory, CPU and so take the case in. But for Linux kernel version 2.6.20 the following not so lucky, according to Stack Overflow of Replies in this way is given, VPSee Python to write a simple script that is used in linux kernel <2.6.20 the printing process under the IO condition .

Kernel < 2.6.20 Kernel <2.6.20

This idea is very simple… Read the rest

Open rar file or Extract rar files under Linux

jason — Sun, 31 Oct 2010 08:19:54 +0000

A. RAR files are in compressed archive format, if you have downloaded rar files from the Internet, you need to unpack or unrar them (extract rar files).

RAR is a proprietary file format for data compression and archiving, developed by Eugene Roshal.

Under Linux and UNIX, use command called unrar. By default unrar is not being installed on Linux, FreeBSD or UNIX oses. You can install unrar command with the help of apt-get or yum command.
Install unrar command

Under Debian Linux, you need to type apt-get as follows to install unrar program:
# apt-get install unrar… Read the rest

Remove Duplicate Packages in CentOS

jason — Thu, 28 Oct 2010 14:44:27 +0000

I got a package dependency issue when updating our 64-bit CentOS server, which was caused by two perl packages installed (i386 and x86_64).
perl i386 4:5.8.8-32.el5_5.1 installed 28 M perl x86_64 4:5.8.8-32.el5_5.1 installed 34 M
I tried to remove it using rpm command but didn’t work (maybe i just don’t know the correct params with rpm). My solution to remove package was using yum “remove package_name.architecture“. Ex: yum remove perl.i386

Any other shortcuts in deleting duplicate packages?