ssh远程拷贝
ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop@192.168.156.101
ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop@192.168.156.102
ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop@192.168.156.103
ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop@192.168.156.104
设置密码过期天数
passwd -x 99999 hadoop : 设置密码过期天数99999
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