SSH with no prompt for password

This is step for use in shell script which there is transfer across the machine within the script. Hope it may helpful.


Note: do on source host and put key on destination host and I did it on HP-UX machine, can be apply to every unix OS.

On source host
$ mkdir .ssh
$ chmod 700 .ssh
$ ssh-keygen -t rsa    ##do not use passphrase
$ touch .ssh/authorized_keys
$ chmod 644 .ssh/authorized_keys
$ ls -al
total 176
drwxr-x---   3 oper1      users         8192 Sep  2 16:26 .
drwxr-xr-x  17 root       root          8192 Sep  2 15:45 ..
-r--r--r--   1 oper1      users          842 Mar 14  2005 .cshrc
-r--r--r--   1 oper1      users          347 Nov 14  2000 .exrc
-r--r--r--   1 oper1      users          344 Mar 14  2005 .login
-r--r--r--   1 oper1      users          449 Mar 14  2005 .profile
-rw-------   1 oper1      users          118 Sep  2 16:26 .sh_history
drwx------   2 oper1      users           96 Sep  2 16:25 .ssh
-rw-r--r--   1 oper1      users          396 Sep  2 16:26 id_rsa.pub
$ sftp targethost
Connecting to targethost...
Password:
sftp> pwd
Remote working directory: /home/oper1
sftp> put id_rsa.pub
Uploading id_rsa.pub to /home/oper1/id_rsa.pub
id_rsa.pub                                                                                        100%  224     0.2KB/s   00:00  
sftp> quit

On target host
$ pwd
/home/oper1/.ssh
$ cat id_rsa.pub >> .ssh/authorized_keys



I think this method is simple, easy and no need more software to install.