Unable to connect Azure ubuntu VM through VS code - azure

Question

Getting below issue while connecting Azure VM through VSCode but we are able to connect through Putty when we used .ppk file. Getting below error when we used both .ppk & .pem using ssh configin VSCode.
Error: Permission denied(Public key)
Below are the ssh logs:
root#VMWDEPOCEUS001:/var/log# tail -30 auth.log Oct 27 10:19:12 VMWDEPOCEUS001 sshd[3087]: Failed password for invalid user ssh user from 156.163.33.75 port 56425 ssh2 Oct 27 10:19:14 VMWDEPOCEUS001 sshd[3087]: Failed password for invalid user ssh user from 156.163.33.75 port 56425 ssh2 Oct 27 10:19:15 VMWDEPOCEUS001 sshd[3087]: Connection reset by invalid user ssh user 156.163.33.75 port 56425 [preauth] Oct 27 10:23:52 VMWDEPOCEUS001 sshd[3095]: Invalid user ssh user1 from 156.163.33.75 port 56590 Oct 27 10:23:57 VMWDEPOCEUS001 sshd[3095]: Failed none for invalid user ssh user1 from 156.163.33.75 port 56590 ssh2 Oct 27 10:24:00 VMWDEPOCEUS001 sshd[3095]: Failed password for invalid user ssh user1 from 156.163.33.75 port 56590 ssh2 Oct 27 10:24:04 VMWDEPOCEUS001 sshd[3095]: Failed password for invalid user ssh user1 from 156.163.33.75 port 56590 ssh2 Oct 27 10:24:05 VMWDEPOCEUS001 sshd[3095]: Connection reset by invalid user ssh user1 156.163.33.75 port 56590 [preauth] Oct 27 10:25:26 VMWDEPOCEUS001 sshd[3099]: Accepted password for user1 from 156.163.33.75 port 56649 ssh2 Oct 27 10:25:26 VMWDEPOCEUS001 sshd[3099]: pam_unix(sshd:session): session opened for user user1 by (uid=0) Oct 27 10:25:26 VMWDEPOCEUS001 systemd-logind[1238]: New session 6 of user user1. Oct 27 10:25:28 VMWDEPOCEUS001 sshd[3167]: Accepted password for user1 from 156.163.33.75 port 56651 ssh2 Oct 27 10:25:28 VMWDEPOCEUS001 sshd[3167]: pam_unix(sshd:session): session opened for user user1 by (uid=0) Oct 27 10:25:28 VMWDEPOCEUS001 systemd-logind[1238]: New session 7 of user user1. Oct 27 10:27:00 VMWDEPOCEUS001 sshd[3258]: Invalid user ssh user1 from 156.163.33.75 port 26689 Oct 27 10:27:14 VMWDEPOCEUS001 sshd[3258]: pam_unix(sshd:auth): check pass; user unknown Oct 27 10:27:14 VMWDEPOCEUS001 sshd[3258]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=156.163.33.75 Oct 27 10:27:16 VMWDEPOCEUS001 sshd[3258]: Failed password for invalid user ssh user1 from 156.163.33.75 port 26689 ssh2 Oct 27 10:27:30 VMWDEPOCEUS001 sshd[3258]: pam_unix(sshd:auth): check pass; user unknown Oct 27 10:27:33 VMWDEPOCEUS001 sshd[3258]: Failed password for invalid user ssh user1 from 156.163.33.75 port 26689 ssh2 Oct 27 10:27:47 VMWDEPOCEUS001 sshd[3258]: pam_unix(sshd:auth): check pass; user unknown Oct 27 10:27:49 VMWDEPOCEUS001 sshd[3258]: Failed password for invalid user ssh user1 from 156.163.33.75 port 26689 ssh2 Oct 27 10:27:49 VMWDEPOCEUS001 sshd[3258]: Connection reset by invalid user ssh user1 156.163.33.75 port 26689 [preauth] Oct 27 10:27:49 VMWDEPOCEUS001 sshd[3258]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=156.163.33.75 Oct 27 10:31:22 VMWDEPOCEUS001 sshd[3279]: Invalid user ssh user1 from 156.163.33.75 port 56826 Oct 27 10:31:34 VMWDEPOCEUS001 sshd[3279]: pam_unix(sshd:auth): check pass; user unknown Oct 27 10:31:34 VMWDEPOCEUS001 sshd[3279]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=156.163.33.75 Oct 27 10:31:35 VMWDEPOCEUS001 sshd[3279]: Failed password for invalid user ssh user1 from 156.163.33.75 port 56826 ssh2 Oct 27 10:32:09 VMWDEPOCEUS001 sshd[3279]: pam_unix(sshd:auth): check pass; user unknown Oct 27 10:32:10 VMWDEPOCEUS001 sshd[3279]: Failed password for invalid user ssh user1 from 156.163.33.75 port 56826 ssh2
Expectation: Need to connect to Azure Ubuntu (18.04) VM using VSCode config file

Answer 1

I tried to reproduce the same in my environment SSH is connected to Azure Ubuntu (18.04) VM using VSCode successfully.
As per Docs Putty is not supported occurs an error. try to install OpenSSh client
Change your user as root:
sudo -s
Try to install ssh or if already install update it and enable your ssh and check whether your status is active like below
sudo apt-get install ssh
sudo apt-get update
systemctl enable ssh.service
systemctl status ssh.service
Generate a ssh key. Try to avoid ssh -i please use user#hostname while configure ssh host like below.
Check whether u have provided config file host, user and hostname are correct.
When I try to connect, I got the same error and ssh log like below.
To resolve this issue:
First try to change your password using sudo passwd root update the password and enable Password Authentication run sudo nano /etc/ssh/sshd_config it will open nano editor like below.
Once your nano editor change a filesystem permission of you scroll down place your cursor in # press insert insert type PermitRootlogin yes and pubkeyauthentication yes press escape &: x Enter
Restart the SSH service by following this command:
sudo systemctl reload sshd
And try to connect with ssh user#hostname it's work.
If still you are facing issue, please check in root ssh install and update check status is active lie above and in nano editor check
PasswordAuthentication
ChallengeResponseAuthentication
GSSAPIAuthentication yes
GSSAPICleanupCredentials no
UsePAM yes
To know more in detail please refer this link:
SSH Failed Permission Denied by phoenixnap
Connect over SSH with Visual Studio Code