yum install -y 包名 --downloadonly --downloaddir=路径 //指定yum下载的安装包路径
yum reinstall -y 包名 --downloadonly --downloaddir=路径 //下载已安装过的软件的rpm包
源码安装
源码包尽量到放到/usr/local/src/目录下
cd /usr/local/src/
wget http://mirrors.cnnic.cn/apache/httpd/httpd-2.2.34.tar.gz
tar zxvf httpd-2.2.34.tar.gz //解包
cd httpd-2.2.34
./configure --prefix=/usr/local/apache2 //指定编译目录为/usr/local/apache2
make //编译
echo $? //如果非零则说明make出错，基本是有依赖未安装，是0则make成功
make install //安装
