1. 创建普通用户，并修改普通用户的密码[root@hadoop126 ~]# useradd hadoop[root@hadoop126 ~]# passwd hadoop2. 配置普通用户具有 root 权限，方便后期加sudo 执行 root 权限的命令[root@hadoop126 ~]# vim /etc/sudoers Defaults secure_path = /sbin:/bin:/usr/sbin:/usr/bin ## Next comes the main part: which users can run what software on ## which machines (the sudoers file can be shared between multiple ## systems). ## Syntax: ## ## user MACHINE=COMMANDS ## ## The COMMANDS section may have other options added to it. ## ## Allow root to run any commands anywhere root ALL=(ALL) ALL ## Allows members of the 'sys' group to run networking, software, ## service management apps and more. # %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS ## Allows people in group wheel to run all commands %wheel ALL=(ALL) ALLhadoop ALL=(ALL) NOPASSWD:ALL 注意：Tom这一行不要直接放到 root行下面，因为所有用户都属于 wheel组，你先配置了Tom具 有免密功能，但是程序执行到 %wheel行时， 该功能又被覆盖回需要密码 。所以Tom要放到 %wheel这行下面。3. 在 /opt目录下创建文件夹 ，并修改所属用户和所属组cd /usr/localmkdir hadoopmkdir optmkdir modulemkdir software[root@k8snode-2 opt]# chown hadoop:hadoop /usr/local/hadoop/opt/module/[root@k8snode-2 opt]# chown hadoop:hadoop /usr/local/hadoop/opt/software/4 克隆虚拟机 利用模板机 hadoop126，克隆 两台虚拟机 hadoop125，hadoop124 注意：克隆时，要先关闭 hadoop1264.1 修改克隆机 IP，以 hadoop126 举例说明（1）修改克隆虚拟机的静态 IP：vim /etc/sysconfig/network-scripts/ifcfg-ens33TYPE="Ethernet"PROXY_METHOD="none"BROWSER_ONLY="no"BOOTPROTO="static"DEFROUTE="yes"IPADDR=192.168.91.126GATEWAY=192.168.91.2DNS1=114.114.114.114DNS2=8.8.8.8IPV4_FAILURE_FATAL="no"IPV6INIT="yes"IPV6_AUTOCONF="yes"IPV6_DEFROUTE="yes"IPV6_FAILURE_FATAL="no"IPV6_ADDR_GEN_MODE="stable-privacy"NAME="ens33"UUID="e7e0b767-4c35-4603-b8ef-e250d0c3e890"DEVICE="ens33"ONBOOT="yes"5.修改克隆机主机名 vi /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.91.124 hadoop124 192.168.91.125 hadoop125 192.168.91.126 hadoop126nb