Yum configuration tutorial

YUM configuration yum, short for Yellow dog Updater Modified, was originally developed by the developer of the yellow dog release Terra Soft, then called yup (yellow dog updater), after the du The university's [email=Linux@Duke]Linux@Duke[/email] development team has made improvements, not to mention this name. The key point of yum is to have a reliable repository. As the name suggests, this is the software repository. It can be a http or ftp site, or it can be a local software pool, but it must contain the rpm header. The header includes various rpm packages. Information, including descriptions, functions, files provided, dependencies, etc. It is the collection of these headers and their analysis to automate the rest of the tasks. yum has the following characteristics: It is possible to configure multiple repositories at the same time. The file (/etc/yum.conf) automatically resolves the dependency problems encountered when adding or removing rpm packages. It is convenient to maintain consistency with the RPM database. 1. YUM client configuration: [root@rhel ~]# vim /etc/Yum.repos.d/rhel-debuginfo.repo [rhel-debuginfo] //[] is the name of the repository name=Red Hat Enterprise Linux $releasever - $basearch - Debug //is the description of the repository can also be said to be the name Baseurl=ftp://ftp.redhat.com/pub/redhat/linux/enterprise/$releasever/en/os/$basearch/Debuginfo///Location of the warehouse enabled=0 //Whether this repository is enabled, 1 is used , 0 is disabled gpgcheck=1 //is Check the GPG signature (used to verify that the package to be installed is REDHAT official) gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release //GGPKEY storage address we need to use The following command imports this signature. To use this function [root@rhel ~]# rpm -import /etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release 2. YUM server configuration: 1) Install vsftp [root@Server]# rpm -ivh vsftpd-2.0.5-10.e15.i386.rpm 2) After the installation is successful, copy all the files on the CD to the /var/ftp/pub directory [root@Server]# cp -rv ../* /var/ftp/pub 3) Switch to the /var/ftp/pub directory and delete *.html Delete Server/repodata/TRANS.TBL Delete the three files VT/repodata/TRANS.TBL files; if you do not delete the above The file may also be successful, but there may be unexpected problems. It is recommended to remove rm -f *.html rm -f Server/repodata/TRANS.TBL rm -f VT/repodata/TRANS.TBL 4) Install the createrepo tool and use this tool to generate the YUM universal database [root@rhel5 Server]# rpm -ivh createrepo-0.4.4-2.fc6.noarch.rpm [root@rhel5 Server]# createrepo -g /var/ftp/pub/Server/repodata/comps-rhel5-server-core.xml /var/ftp/Pub/Server/[root@rhel5 Server]# createrepo -g /var/ftp/pub/VT/repodata/comps-rhel5-vt.xml /var/ftp/pub/VT/5) Then start the FTP service again: service Vsftpd restart 1. List all updateable software list commands: yum check-update2. Install all update software commands: yum update3. Install only the specified software commands: yum install4. Update only the specified software commands: yum update5. All installable software list commands: yum list6. The deleted command is yum remove xxx. Like the installation, yum will also query the database and give hints for resolving dependencies. 7.YUM query software information command: yum search8. List all installable package commands: yum list9. List all updateable package commands: yum list updates10. List all installed package commands: yum list Installed11. Lists all installed package commands that are not in Yum Repository: yum list extras12. Use YUM to get package information command: yum info13. List all installed package information commands: yum info installed14. List all Package information command installed but not in Yum Repository: yum info extras15. Clearing the YUM cache yum will store the downloaded package and header in the cache without being automatically deleted. If we think that they take up disk space, you can use the yum clean command to clear. The more accurate usage is yum clean headers to clear the header, yum clean packages to clear the downloaded rpm package, yum clean all one brain. 16. Clear the cache directory (/Package command under var/cache/yum): yum clean packages17. Clear the headers command in the cache directory (/var/cache/yum): yum clean headers