-------------------

Package reconfigure-0.1.81-1.noarch.rpm is not signed

    wget http://realrepo.ajenti.org:8888/ng/centos/6/x86_64/reconfigure-0.1.81-1.noarch.rpm

    rpm -ivh reconfigure-0.1.81-1.noarch.rpm

                                                                                    or

  yum -y install http://realrepo.ajenti.org:8888/ng/centos/6/x86_64/reconfigure-0.1.81-1.noarch.rpm

   yum clean all

    yum -y update

Warning: RPMDB altered outside of yum.

yum history sync

yum history new

yum clean all

yum clean metadata

Yum. Error with rpmdb

 yum clean

 rm -f /var/lib/rpm/__db*

 rpm --rebuilddb

update fails, duplicated packages

yum-complete-transaction

package-cleanup --dupes              # lists duplicate packages

package-cleanup --cleandupes         # removes duplicate packages

To find and delete dup packages (one line):

sudo sh -c 'for file in `rpm -qa --queryformat="%{NAME} %{ARCH}\n" | sort | uniq -c | grep -v " 1 " | cut -c 9- | cut -d" " -f1`; do rpm -q --last $file | head -1 | cut -d" " -f1; done | grep -v kernel | grep -v gpg-pubkey | xargs rpm -e --justdb --nodeps'

yum-complete-transaction

package-cleanup --problems

package-cleanup --dupes

package-cleanup --cleandupes

rpm -Va --nofiles --nodigest

yum clean all

rpm --rebuilddb

yum update

yum update or yum install fails with package conflict between 64 bit and 32 bit package architectures

yum install yum-utils

The package-cleanup --dupes lists all duplicate packages:

# package-cleanup --dupes 

The package-cleanup --cleandupes removes the duplicates (it asks for a confirmation to remove all duplicates unless the -y switch is given):

# package-cleanup --cleandupes   

Edit /etc/yum.conf, set the following line for Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6:

exactarch=1

Edit /etc/yum.conf, set the following line for Red Hat Enterprise Linux 7:

exactarchlist=*

Run yum command:

# yum clean all

# yum update

                   ------------------------x-------------------------------

[root@mail ~]# yum reinstall yum

rpmdb: Thread/process 29719/140504333125536 failed: Thread died in Berkeley DB library

error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery

error: cannot open Packages index using db3 - (-30974)

error: cannot open Packages database in /var/lib/rpm

CRITICAL:yum.main:

Error: rpmdb open failed

# mkdir /var/lib/rpm/backup

cp -a /var/lib/rpm/__db* /var/lib/rpm/backup/

rm -f /var/lib/rpm/__db.[0-9][0-9]*

rpm --quiet -qa

rpm --rebuilddb

yum clean all

        -----------XXX------------------

yum-complete-transaction

package-cleanup --problems

package-cleanup --dupes

package-cleanup --cleandupes

rpm -Va --nofiles --nodigest

yum clean all

rpm --rebuilddb

yum update

find the actual command(s) in that thread. To see the duplicates packages:

sudo sh -c 'for file in `rpm -qa --queryformat="%{NAME} %{ARCH}\n" | sort | uniq -c | grep -v " 1 " | cut -c 9- | cut -d" " -f1`; do rpm -q --last $file | head -1 | cut -d" " -f1; done | grep -v kernel | grep -v gpg-pubkey | xargs rpm -e --justdb --nodeps'

RPM - 5.x  Server

http://vault.centos.org/5.8/os/x86_64/CentOS/

                                    /5.9/os/x86_64/CentOS/

                       /5.10/os/x86_64/CentOS/

                                   /5.11/os/x86_64/CentOS/

centos 5.11 removing mirrorlist with no valid mirrors: /var/cache/yum/base/mirrorlist.txt

CentOS 5 fails: RepoError: Cannot find a valid baseurl for repo: base

Open the file /etc/yum.repos.d/CentOS-Base.repo in any editor and comment baseurl and mirrorlist directives in each enabled section.

Add a new baseurl directive with an appropriate link for each enabled section as shown below:

#  cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.BK

 #   vi /etc/yum.repos.d/CentOS-Base.repo