Permission Denied Please Try Again Ssh

Introduction

The SSH Permission denied fault appears later permission-related settings are modified on the SSH server. Usual scenarios include a new package installation or the cosmos of new users.

In this tutorial, you volition learn how to troubleshoot the SSH Permission denied error and reconnect to your SSH server.

Prerequisites

• SSH client on the local motorcar and SSH server on the remote organisation
• A user account to access the remote server (for password-based login)
• A user account withsudo orrootprivileges

What is Causing SSH Permission Denied (publickey,gssapi-keyex,gssapi-with-mic)?

The SSH Permission denied error appears when trying to SSH into a server:

          Permission denied (publickey,gssapi-keyex,gssapi-with-mic)        

Following the Permission denied statement, the bracket contains the attempted hallmark methods that failed at the initiation of the connection. The error suggests that the public key is the issue, which is misleading.

1 reason for the error may exist sshd_config , the file that contains SSH server configuration. The other possibility is that the authorized_keys file has bereft permissions. This file contains the list of public keys for the clients allowed to SSH into the server. Consequently, the system's disability to read from the file results in the Permission denied error.

How to gear up SSH Permission denied

Both solutions contain steps you lot need to perform on the server-side. Kickoff past opening the final on your server and proceed with one of the solutions below.

Solution 1: Enable Password Authentication

If you lot want to use a password to access the SSH server, a solution for fixing the Permission denied fault is to enable password login in the sshd_config file.

To do this, open the file in a text editor.  This example uses the nano editor:

          sudo nano /etc/ssh/sshd_config        

In the file, detect the PasswordAuthentication line and brand sure it ends with yes .

Observe the ChallengeResponseAuthentication choice and disable it by adding no .

If lines are commented out, remove the hash sign # to uncomment them.

Save the file and get out.

Restart the SSH service by typing the following command:

          sudo systemctl restart sshd        

Solution 2: Change File System Permissions

Using the password-based login as the SSH authentication method is not recommended due to security concerns. Therefore, the post-obit solution may exist preferable since it troubleshoots the public cardinal authentication method.

Commencement, open the sshd_config file using a text editor:

          sudo nano /etc/ssh/sshd_config        

In the file, make certain the following options are set as follows:

          PermitRootLogin no PubkeyAuthentication yep        

Note: The steps above are considered best security practices. If you need to use root login, fix the relevant line to yes .

Comment out the GSSAPI-related options by calculation the hash sign at the beginning of the line:

          #GSSAPIAuthentication yes #GSSAPICleanupCredentials no        

Likewise, make certain the UsePAM line is fix to yes :

          UsePAM yes        

Save the file and restart the sshd service:

          systemctl restart sshd        

Now navigate to your home folder and check the permissions:

          ls -ld        

If your owner permissions are not set to read, write, and execute ( drwx------ ), use the chmod control to change them:

          chmod 0700 /dwelling house/[your-username]        

At present go to the .ssh folder and recheck the permissions:

          ls -ld        

This directory should also take read, write, and execute permissions for the file owner. To enforce them, use chmod again:

          chmod 0700 /domicile/your_home/.ssh        

The .ssh binder contains the authorized_keys file. Check its permissions with:

          ls -ld authorized_keys        

The file owner should accept read and write permissions. To set them, use:

          chmod 0600 /home/[username]/.ssh/authorized_keys        

At present try logging in with the cardinal pair again. The output below shows a successful login attempt.

Decision

This tutorial covered the steps necessary to troubleshoot the SSH Permission denied (publickey,gssapi-keyex,gssapi-with-mic) error. Past completing the steps in the guide, you should ready the fault and successfully SSH into your server.

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Source: https://phoenixnap.com/kb/ssh-permission-denied-publickey

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