Error: Package tuple  could not be found in packagesack.if you get this message  if you make changes to
from the default in your /etc/yum.conf or any of your *.repo files in /etc/yum.repos.d/,
for this only workaround is to clean the yum repository.
solution for this  yum repository that I found by disabling all …

upgrade to the latest Firefox 3.5, featuring improved security, stability, personalization

1.You need to below lines to sources.list file,to do this run below command on terminal
$sudo gedit /etc/apt/sources.list
2.Add below scoure links
deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main
3.Save and close file.
4.Now you need to add trusted key for this repository,by running below …

To Upgrade php5.1 to php5.2 on Cetnos 5.04
First you need to create
1.[root@localhost ]# touch /etc/yum.repos.d/CentOS-5.repo
2.Add below lines to Centos-5.repo file
[c5-testing]
name=CentOS-5 Testing
baseurl=http://dev.centos.org/centos/$releasever/testing/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://dev.centos.org/centos/RPM-GPG-KEY-CentOS-testing
3.[root@localhost ~]# yum –enablerepo=c5-testing install php
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: mirror.nus.edu.sg
* base: mirror.nus.edu.sg
* extras: mirror.nus.edu.sg
* livna: ftp-stud.fht-esslingen.de
* rpmforge: ftp-stud.fht-esslingen.de
* updates: mirror.nus.edu.sg
c5-testing                                                                                        | 1.9 kB     …

Yum :
Yum is an interactive ,rpm based,pakackage manager.It can automatically performs system updates.It also performs installation of new packages and removal of new packages.
Below are the yum manual
To list the yum options
$yum -h
To list the installed package that matches given string
$yum list httpd
To localate all packages that contain the string …

IF you get below message
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote …