修改 hostname
- [root@centos7 ~]$ hostnamectl set-hostname hadoop001 # 使用这个命令会立即生效且重启也生效
- [root@centos7 ~]$ hostname # 查看下
- hadoop001
- [root@centos7 ~]$ vim /etc/hosts # 编辑下 hosts 文件, 给 127.0.0.1 添加 hostname
- [root@centos7 ~]$ cat /etc/hosts # 检查
- 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 hadoop001
- ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
免密码登录
- scp id_rsa.pub lau@192.168.1.108:/home/lau/.ssh/pub_key
- # 登录用户
- cd ~/.ssh/
- cat pub_key>> authorized_keys
- chmod 600 /home/lau/.ssh/authorized_keys
来源: http://www.bubuko.com/infodetail-2685991.html