linux ssh centos 6.2 login displays Server refused our key_回眸一度_ Baidu Space

Jun 17, 201349

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The user encountered an issue with SSH key authentication on CentOS 6.2. They found that the problem was related to permissions and were able to resolve it by using the command "restorecon -R -v /root/.ssh" to set the correct permissions. They also provided instructions for setting up SSH key login and adding a user to the su group for remote management.

linux ssh centos 6.2 login shows Server refused our key_回眸一度_百度空间.

Today, when setting up SSH key automatic login, I found that the message "Server refused our key" always appeared. After searching online for a long time, I found that the problem was with the permissions. Modifying the chmod permissions didn't work either. Finally, I found a method: restorecon -R -v /root/.ssh. After setting the permissions this way, I was able to log in.

restorecon, used to restore the default attributes of files/directories:

restorecon -v file # v is for 'verbose'restorecon -R dir # R is for 'recursive'

Set up SSH using key login:

1 Set /etc/ssh/sshd_config

PermitRootLogin yes

RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys

PasswordAuthentication no PermitEmptyPasswords no

2 service sshd restart

/etc/init.d/sshd restart

3 Set permissions:

chmod 600 /root/.ssh/authorized_keys

Add user to the su group:

Use the ordinary user "uploader" for remote management, then switch to the root user with "su root" to obtain the highest privileges

Modify ordinary user to have root privileges

1) Enter super user mode. That is, enter "su -", the system will ask for the super user password, enter the password and enter super user mode. (Of course, you can also use root directly)

2) Add write permission to the file. That is, enter the command "chmod u+w /etc/sudoers".

3) Edit the /etc/sudoers file. That is, enter the command "vim /etc/sudoers", enter "i" to enter edit mode, find this line: "root ALL=(ALL) ALL", add "xxx ALL=(ALL) ALL" below it (where xxx is your username), then save (press Esc key, then enter ":wq" to exit).

4) Revoke write permission for the file. That is, enter the command "chmod u-w /etc/sudoers".