Key Logon Settings in Linux

Key Logon Settings in Linux

Procedure for logging on to Linux with a key (using putty ):

1. Use putty to remotely log on to the Linux server, use puttygen to generate a key, save the generated key, and save the private key to copy and save the public key to the authorized_keys file on the Linux server.

2. Create a file:

Vi/root/. ssh/authorized_keys // create the file authorized_keys

Chmod 600/root/. ssh/authized_keys // Add Permissions

Chmod 700/root/. ssh // Add Permissions

3. Clear firewall settings:

Iptables-F // clear settings

Service iptables save // save settings

4. Disable seLinux.

Seteforce 0 // temporarily shut down and restart, and then the system becomes invalid

Vi/etc/seLinux/config // change seLinux = enforcing to seLinux = disabled // always disable

5. Edit the ssh configuration file:

Vi/etc/ssh/sshd_config // edit the ssh configuration file
PasswordAuthentication no // password-based login prohibited
PubkeyAuthentication yes // allow key-Based Access
6. Restart ssh

#/Etc/init. d/sshd reload

Service sshd restart

7. After the configuration is complete, only users with the key can log on to the Linux system.

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