I want to connect my jetson nano with my laptop

I already made netplan .yaml and open ufw and enable ssh but when I try to connect ssh the below error appear
The authenticity of host ‘ipadress (ipaddress)’ can’t be established.
ECDSA key fingerprint is SHA256
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added ‘ipaddress’ (ECDSA) to the list of known hosts.
ubuntu@(my ip’s password:
Permission denied, please try again.
ubuntu@ipaddress: Permission denied (publickey,password).
when I enter the jetson nano the password is 0000 so I enter 0000 as a password but this error appears I dont know why

Can you monitor files in your Jetson during the ssh login attempt? Run this and see what shows up as a result of the login attempt:
tail -f /var/log/auth.log

onekids@ubuntu:~$ tail -f /var/log/auth.log
Feb 11 17:56:00 ubuntu sshd[4546]: Invalid user ubuntu from 192.168.163.58 port 60140
Feb 11 17:56:07 ubuntu sshd[4546]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:56:07 ubuntu sshd[4546]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.163.58
Feb 11 17:56:09 ubuntu sshd[4546]: Failed password for invalid user ubuntu from 192.168.163.58 port 60140 ssh2
Feb 11 17:56:28 ubuntu sshd[4546]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:56:30 ubuntu sshd[4546]: Failed password for invalid user ubuntu from 192.168.163.58 port 60140 ssh2
Feb 11 17:56:40 ubuntu sshd[4546]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:56:42 ubuntu sshd[4546]: Failed password for invalid user ubuntu from 192.168.163.58 port 60140 ssh2
Feb 11 17:56:44 ubuntu sshd[4546]: Connection closed by invalid user ubuntu 192.168.163.58 port 60140 [preauth]
Feb 11 17:56:44 ubuntu sshd[4546]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.163.58
Feb 11 17:57:07 ubuntu sshd[4554]: Invalid user ubuntu from 192.168.163.58 port 60230
Feb 11 17:57:12 ubuntu sshd[4554]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:57:12 ubuntu sshd[4554]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.163.58
Feb 11 17:57:14 ubuntu sshd[4554]: Failed password for invalid user ubuntu from 192.168.163.58 port 60230 ssh2
Feb 11 17:57:21 ubuntu sshd[4554]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:57:23 ubuntu sshd[4554]: Failed password for invalid user ubuntu from 192.168.163.58 port 60230 ssh2
Feb 11 17:57:28 ubuntu sshd[4554]: pam_unix(sshd:auth): check pass; user unknown
Feb 11 17:57:29 ubuntu sshd[4554]: Failed password for invalid user ubuntu from 192.168.163.58 port 60230 ssh2
Feb 11 17:57:31 ubuntu sshd[4554]: Connection closed by invalid user ubuntu 192.168.163.58 port 60230 [preauth]
Feb 11 17:57:31 ubuntu sshd[4554]: PAM 2 more authentication failures; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.168.163.58

I entered it as you said and the log above appeared. Also the password I entered is exactly the password that must be entered when starting Jackson Nano but I don’t know why it says the password failed

Yes, that is a bit of a mystery. If something were corrupted, then I would think the failure message would also be corrupted. Do you have another Linux computer handy you could try to ssh to to see if that fails in the same way? Is there any kind of unusual network hardware or configuration, e.g., a proxy instead of a switch or router?

Does the Jetson allow ssh from itself to itself? Example, from the Jetson (assuming login name ubuntu):
ssh ubuntu@localhost
…or…
ssh ubuntu@127.0.0.1

Also, on the Jetson itself, you could change the password, and then try again with the new password (check if local ssh works first). As a last resort, maybe use a different keyboard, or copy and paste the password (be sure to not copy the newline).

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