【CentOS 7笔记28】，yum的用法#yum工具操作yum搭建本地仓库yum更换国内源yum下载rpm包方

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yum工具操作

yum list #列出可用的所有软件包

[root@localhost ~]# ls /etc/yum.repos.d/CentOS-
CentOS-Base.repo       CentOS-Debuginfo.repo  CentOS-Media.repo      CentOS-Vault.repo
CentOS-CR.repo         CentOS-fasttrack.repo  CentOS-Sources.repo  
[root@localhost ~]# vi /etc/yum.repos.d/CentOS-Base.repo
	# CentOS-Base.repo
	#
	# The mirror system uses the connecting IP address of the client and the
	# update status of each mirror to pick mirrors that are updated to and
	# geographically close to the client.  You should use this for CentOS updates
	# unless you are manually picking other mirrors.
	#
	# If the