which nginx :查看nginx是否存在

which php :查看php是否存在which mysql :查看mysql是否存在yum list nginx :列出nginxyum install nginx :安装nginx出现｛Complete! } 表示安装成功。which nginx 查看nginx是否存在service nginx start 启动nginxps -ef | grep nginx 查看nginx进程ifconfig：查看网卡信息