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2025-03-31 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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Take the xshell connection tool as an example
Generate secret key
Select RSA as the key type. Next step
Name customization. Next step
You can save a copy of the key to the computer and finish it.
The picture below is the private key, or you can save a copy to the computer.
The private key is reserved for connecting to the server, and the public key is transferred to the server configuration file (how to pass it later)
Operations on the server
1. Transfer the public key to the server under the root directory
two。 Execute the command to write to the key profile
Ssh-keygen-X-f xjw.pub > > / root/.ssh/authorized_keys2
The error is reported because there are no .ssh directories and files. The solution is to link to the server.
Command line input: ssh localhost
Execute it again and you will have: ssh-keygen-X-f xjw.pub > > / root/.ssh/authorized_keys2
1. Modify the configuration file: vim / etc/ssh/sshd_config
Modify ssh connection port (default 22, modify if necessary): search for Port
two。 Modify access key file path
Search for AuthorizedKeysFile, which is commented out by default, and accesses the .ssh / authorized_keys file. If you want to change it or not, I have created a new authorized_keys2 here.
3. Modify and cancel password login
Search PasswordAuthentication and change yes to no
Note: if you find a machine that can neither log in with a password nor log in with a key, you need to check these two lines of configuration files to see whether they have been uncommented and changed to no. Both are allowed by default.
# RSAAuthentication yes
# PubkeyAuthentication yes
Restart the sshd service: service sshe restart
Add sudo permissions to ordinary users
Create a normal user
[root@localhost ~] # useradd test1
Add permission
Modify the configuration file:
[root@localhost ~] # vim / etc/sudoers
Find the configuration of the root user and add it below him.
Note: user's method of changing password
Local user changes password: passwd
Change other user passwords: passwd username
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