LINUX间SSH免密登录

假如有三台LINUX电脑

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$ cat /etc/hosts ...    192.168.122.100 dev01 192.168.122.101 dev02 192.168.122.102 dev03    ...

　　

1、建立新用户，如果使用ROOT帐户，跳过此步

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$ useradd -d /home/dev -m dev $ passwd dev    $ echo "dev ALL = (root) NOPASSWD:ALL" | tee /etc/sudoers.d/dev $ chmod 0440 /etc/sudoers.d/dev

2、SSH免密登录

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$ ssh-keygen $ ssh-copy-id dev@dev01 $ ssh-copy-id dev@dev02 $ ssh-copy-id dev@dev03

3、设置CONFIG

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$ vi ~/.ssh/config Host dev01    Hostname dev01    User dev Host dev02    Hostname dev02    User dev Host dev03    Hostname dev03    User dev

4、免密登录测试

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[root@dev01 ~]# ssh dev02 Last login: Wed Aug 22 16:55:06 2018 from dev01 [osdev@dev02 ~]$ exit 登出 Connection to dev02 closed. [root@dev01 ~]# ssh dev03 Last login: Wed Aug 22 16:55:35 2018 from dev01 [osdev@dev03 ~]$ exit 登出 Connection to dev03 closed.