centos6.5配置SSH免密码登录
centos6.5配置SSH免密码登录
创建新用户:useradd hadoop设置密码:passwd hadoop,输入自己想要的密码即可,之后su hadoop切换用户
修改主机名:vim /etc/sysconfig/network,加入hostname master,注销系统之后即可看到修改成功
修改hosts文件:vim /etc/hosts 192.168.56.101 master 192.168.56.102 slave1
ssh免登录,查看ssh:
[hadoop@master ~]$ rpm -qa|grep ssh openssh-server-5.3p1-94.el6.x86_64 libssh2-1.4.2-1.el6.x86_64 openssh-clients-5.3p1-94.el6.x86_64 openssh-5.3p1-94.el6.x86_64 openssh-askpass-5.3p1-94.el6.x86_64 |
修改/etc/ssh/sshd_config
RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys |
现在开始配置无密码登录
[hadoop@master ~]$ cd /home/hadoop/ [hadoop@master ~]$ ssh-keygen -t rsa 一路回车 [hadoop@master ~]$ cd .ssh/ [hadoop@master .ssh]$ cp id_rsa.pub authorized_keys [hadoop@master .ssh]$ chmod 600 authorized_keys 把authorized_keys复制到其他要无密的机器上 [hadoop@master ~]$ scp authorized_keys root@192.168.56.102:/home/hadoop/.ssh 要以root权限过去,否则会出错 |
chmod 700 -R .ssh 如果你想要每台机子都无密码登录,那么把每台机子产生的密钥添加到文件中(这是在受控端机子上面执行的) cat id_rsa.pub >> .ssh/authorized_keys |
scp authorized_keys root@192.168.56.101:/home/hadoop/.ssh/ 将文件拷贝到master之后,在master上面执行: cat id_rsa.pub >> .ssh/authorized_keys 这样既可以从master到slave1,也可以从slave1到master,均是免密码登录 |
[hadoop@master ~]$ clear [hadoop@master ~]$ ssh slave1 Last login: Mon Nov 3 13:33:02 2014 from 192.168.56.101 [hadoop@slave1 ~]$ ssh master Last login: Mon Nov 3 13:33:06 2014 from 192.168.56.102 [hadoop@master ~]$ |
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