Piyush 
Hi guys, I am facing a problem while implementing the SSH connection to my board and I am just one step away from my goal. Actually the problem statement is as follows: I have an embedded development board based on s3c2440 microcontroller. The cross compiled openSSH have been installed in the folder /usr/local/bin and /usr/local/etc. Following is the snapshot ~ $ ls -l /usr/local/bin/ -rwxr-xr-x 1 root root 157786 Feb 23 23:01 scp -rwxr-xr-x 1 root root 245720 Feb 24 01:18 sftp -rwxr-xr-x 1 root root 3074202 Feb 24 01:20 ssh -rwxrwxr-x 1 root root 2392577 Feb 14 2017 ssh-add -rwxrwxr-x 1 root root 2290887 Feb 14 2017 ssh-agent -rwxrwxr-x 1 root root 2551181 Feb 14 2017 ssh-keygen -rwxrwxr-x 1 root root 2404513 Feb 14 2017 ssh-keyscan -rwxrwxr-x 1 root root 3250915 Feb 14 2017 sshd and for /usr/local/etc: ~ $ ls -l /usr/local/etc/ -rw-r--r-- 1 root root 242153 Aug 30 2012 moduli -rw-r--r-- 1 root root 1574 Oct 9 2013 ssh_config -rw------- 1 root root 668 Feb 25 03:09 ssh_host_dsa_key -rw-r--r-- 1 root root 603 Feb 25 03:09 ssh_host_dsa_key.pub -rw------- 1 root root 227 Feb 25 03:10 ssh_host_ecdsa_key -rw-r--r-- 1 root root 175 Feb 25 03:10 ssh_host_ecdsa_key.pub -rw------- 1 root root 672 Feb 25 03:15 ssh_host_ed25519_key -rw-r--r-- 1 root root 603 Feb 25 03:15 ssh_host_ed25519_key.pub -rw------- 1 root root 1679 Feb 25 03:04 ssh_host_rsa_key -rw-r--r-- 1 root root 395 Feb 25 03:04 ssh_host_rsa_key.pub -rw-r--r-- 1 root root 3646 Feb 27 07:06 sshd_config -rw-r--r-- 1 root root 3646 Feb 27 06:56 sshd_config_ori Here you can see that I have done almost everything. when I run ssh on my linux development board I get this : ~ $ ~ $ /usr/local/bin/sshd ~ $ ~ $ ps | grep ssh 893 root /usr/local/bin/sshd ~ $ ~ $ this means the SSH is running on my board. Now the case is that my embedded linux does not have any login screen and open up into the root screen automatically without asking for the password. Now when I try to connect to the linux board from my computer through SSH than it asks for the password for the root of the embedded linux board. But I don't have any and therefore it terminates the SSH session after three trials of password like this. piyush@piyush-System-Product-Name:~$ sudo ssh root@192.168.18.32 root@192.168.18.32's password: Permission denied, please try again. root@192.168.18.32's password: Permission denied, please try again. root@192.168.18.32's password: Permission denied (publickey,password,keyboard-interactive). piyush@piyush-System-Product-Name:~$ so whenever I try to execute the command passwd to create the password I get following error: ~ $ passwd root /etc/passwd: /etc/passwd: 1: root::0:0:root:/:/bin/sh: not found /etc/passwd: /etc/passwd: 2: bin:*:1:1:bin:/bin:: not found /etc/passwd: /etc/passwd: 3: daemon:*:2:2:daemon:/sbin:: not found /etc/passwd: /etc/passwd: 4: nobody:*:99:99:Nobody:/:: not found /etc/passwd: /etc/passwd: 5: sshd:x:74:74:Priviledge-separated: not found So I want to know that how can I remove this problem for successful SSH connection establishment.
