SSH without Password

January 15, 2007, 9:47 pm

Posted by am3n in Linux

Sometime to automates your script you'll to copy some file via scp or sftp or may you get bored to ssh to same server everyday and asking you the same password. Here's how to automated your scp, sftp, and ssh to login without password

1. Go to your home folder

CODE:
$ cd ~

2. Pass this step if you already has .ssh folder

CODE:
$ mkdir .ssh

3. Set private

CODE:
$ chmod -R 0700 .ssh

4. Go to your ~/.ssh folder

CODE:
$ cd .ssh

5. Create a ssh public_key

CODE:
$ ssh-keygen -t dsa -f id_dsa -P ''

6. Copy PUBLIC key ONLY to .ssh folder on target server

CODE:
$ scp id_dsa.pub user@server:~/.ssh

7. Now log into the remote server as the target user

CODE:
$ ssh user@server

8. Go to it's .ssh folder

CODE:
$ cd .ssh

9. Put your public key in the authorized keys file

CODE:
$ cat id_dsa.pub >> authorized_keys2

10. Set privates the authorized_keys2

CODE:
$ chmod 0600 authorized_keys2

11. Delete the public key on the remote server

CODE:
$ rm id_dsa.pub

12. Exit the server

CODE:
$ exit

Now if everything is correct you should be able to ssh, scp and sftp to target server without password

CODE:

$ ssh user@server

$ scp testfile.txt user@server:/data

Based on http://homepage.mac.com/kelleherk/iblog/C1901548470/E20061128145420/index.html

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