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?????OpenSSH??????

?CentOS????OpenSSH??????????????????????OpenSSH????????????

?????????OpenSSH???????????????OpenSSH??????

????????????OpenSSH??

rpm -qa openssh*

????????????????

[root@node51 ~]# rpm -qa openssh* openssh-server-6.6.1p1-11.el7.x86_64 openssh-6.6.1p1-11.el7.x86_64 openssh-clients-6.6.1p1-11.el7.x86_64

????????????????OpenSSH???

yum remove openssh-server-6.6.1p1-11.el7.x86_64yum remove openssh-clients-6.6.1p1-11.el7.x86_64yum remove openssh-6.6.1p1-11.el7.x86_64

????????????????????OpenSSH?????

yum remove openssh*

?????????OpenSSH???????OpenSSH????????????

yum install -y openssl openssh-server

??????OpenSSH????????????OpenSSH??????????/etc/ssh/sshd_config????????????????????

• PermitRootLogin????yes???root?????
• RSAAuthentication????yes???RSA?????
• PubkeyAuthentication????yes????????

???????sshd???

systemctl restart sshd.service

?????????????sshd?????????????

systemctl enable sshd.service

?????

• ???????????????????????
• ????????????sshd_config????????root?????

????????OpenSSH??????????

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