Reference: http://blog.chinaunix.net/uid-346158-id-2131252.html
PS: not organized.
Basic command:
Yum check-Update checks all packages that can be updated Yum Update downloads update system All packages installed Yum Upgrade Large-scale version upgrade, unlike Yum Update, even the old obsolete package is upgraded to yum install<packages>Install new package yum Update<packages>update the specified package yum remove<packages>uninstalling the specified package yum Groupinstall<groupnames>install packages in the specified software group Yum groupupdate<groupnames>update packages in a specified software group yum groupremove<groupnames>to uninstall a package from a specified software group Yum grouplist view the installed and available software groups in the system Yum list lists all the RPM packages that can be installed or updated and installed in the repository in the yum list<regex>lists the RPM packages that can be installed or updated and that have already been installed in the resource pool that match regular expressions Yum list available lists all the RPM packages that can be installed in the Repository Yum list available<regex>lists all available RPM packages in the repository that match regular expressions Yum list updates lists all the RPM packages in the repository that can be updated Yum list updates<regex>lists all the updatable RPM packages in the repository that match regular expressions Yum list installed lists all installed RPM packages in the Repository Yum list installed<regex>lists all installed RPM packages in the repository that match regular expressions Yum List extras lists the RPM packages that have been installed but not included in the repository Yum list Extras<regex>lists the RPM packages installed but not included in the repository that match the regular expression Yum list recent lists the packages that were recently added to the repository Yum search<regex>detects names, descriptions, overviews, and listed maintainers of all available software, looking for values that match regular expressions Yum provides<regex>detects the files contained in the package and the functionality provided by the software to find values that match regular expressions Yum clean headers clears the RPM header file in cache Yum Clean packages clear Cache rpm package file All clears the cache of RPM header files and package files Yum deplist<packages>display dependency information for a package when the first time you use the Yum or Yum repository for updates, Yum automatically downloads all the required he ADE Rs placed in/var/cache/in the Yum directory, the time required may be longer. You can also use the Yum Info command to list package information, and Yum info has the same parameters as the Yum list. The Yum command can also be usedThe-y parameter is used to answer the questions raised when the command is run with ye S, such as yum-y install VSFTPD, so you don't have to enter yes/y when installing the software.
Yum instruction (not completed)