Yum command

Warehouse profile location ：/etc/yum.repos.d/
The cache location ：/var/cache/yum/

#  Search package 
yum search <package>
#  Install package 
yum install <package>
#  Remove package 
yum remove <package>
#  Update package 
yum update <package>
#  Find software listings that contain keywords （ Look in all the software listings ）
yum list | grep keyword
#  Find software listings that contain keywords （ Look in the installed software inventory ）
yum list installed | grep keyword
#  View software dependencies 
yum deplist <package>

#  Generate warehouse software inventory cache 
#  The cache directory ：/var/cache/dnf/  or  /var/cache/yum
yum makecache
#  Delete the software inventory cache of the warehouse 
yum clean