[root@openldap ~]# yum update Loaded plugins: security base | 2.9 kB 00:00 base/primary_db | 1.9 MB 00:00 http://192.168.10.10:9999/CentOS/5.11/base/repodata/dc8d44cb1b8ee2488ce1570def00bcd7d6b6531276d084ebacf58ea0648363ae-primary.sqlite.bz2: [Errno -3] Error performing checksum Trying other mirror. base/primary_db | 1.9 MB 00:00
Yum is not able to calculate the sha256 checksum correctly. Help him by installing the hash package from EPEL (http://dl.fedoraproject.org/pub/epel/5/x86_64/)
[root@openldap ~]# rpm -Uhv python-hashlib-20081119-4.el5.x86_64.rpm [root@openldap ~]# yum list |more Loaded plugins: security Installed Packages Deployment_Guide-en-US.noarch 5.8-1.el5.centos installed GConf2.x86_64 2.14.0-9.el5 installed MAKEDEV.x86_64 3.23-1.2 installed NetworkManager.i386 1:0.7.0-13.el5 installed NetworkManager.x86_64 1:0.7.0-13.el5 installed NetworkManager-glib.i386 1:0.7.0-13.el5 installed NetworkManager-glib.x86_64 1:0.7.0-13.el5 installed
find dig program:
[root@openldap ~]# yum whatprovides dig 32:bind-utils-9.9.4-29.el7.ppc64le : Utilities for querying DNS name servers Repo : centos_base Matched from: Filename : /usr/bin/dig
Install package utilities
# yum install yum-utils
Identify duplicate packages
# package-cleanup --dupes
Cleanup duplicate packages
# package-cleanup --cleandupes
Check problems
# package-cleanup --problems
# yum check # yum-complete-transaction
Another way to suppress duplicate, just remove the duplicate in the RPM database
# rpm -e --justdb <package>
Remove old kernels
# dnf remove --oldinstallonly