vim/etc/sysconfig/network    配置网卡systemctlrestartnetwork    重启网络groupaddhadoop    创建用户组useradd-ghadoophadoop    创建用户passwdhadoop    创建密码visudo    设置sudo权限hadoopALL=(ALL)NOPASSWD:ALLhostnameshilei    临时修改vim/etc/hostname    永久修改，...