keepcache=0 更改为1下载RPM包 不会自动删除

vi /etc/yum.conf 

[main]cachedir=/var/cache/yum/$basearch/$releasever # 安装包默认下载地址keepcache=1 # 不会自动删除debuglevel=2logfile=/var/log/yum.logexactarch=1obsoletes=1gpgcheck=1plugins=1installonly_limit=5bugtracker_url=http://bugs.centos.org/set_project.php?project_id=23&ref=http://bugs.centos.org/bug_report_page.php?category=yumdistroverpkg=centos-release

只下载安装包，不安装指令

yum install --downloadonly --downloaddir=/home/java java