Sponsored Content
Special Forums UNIX and Linux Applications SSH: Avoiding password prompt with rsa key generation Post 302220440 by same1290 on Thursday 31st of July 2008 05:50:15 PM
Old 07-31-2008
SSH: Avoiding password prompt with rsa key generation

Hi,

I am using a remote storage service for backing up our data - we want to have a script run as part of a cron job which would do the backups from our local Linux machine to the service's Linux machine.

I want to use tar and ssh to do this (rather than mounting the disk and using cp) . Therefore want to learn how to avoid having to type in a password with ssh. I am new to this feature so I went online and read the procedure, downloaded and built OpenSSH and did the following:

$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/homes/12/same/.ssh/id_rsa):
/homes/12/same/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /homes/12/same/.ssh/id_rsa.
Your public key has been saved in /homes/12/same/.ssh/id_rsa.pub.
The key fingerprint is:
27:a4:d4:63:35:62: ... same@dpdw

$ ssh-copy-id -i ~/.ssh/id_dsa.pub test3@remote.machine
test3@remote.machine''s password:
Now try logging into the machine, with "ssh 'test3@remote.machine'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

So at this point I'm expecting to be able to ssh into the remote machine and not be prompted for a password. Is this what should happen? As can be below seen I'm still prompted.

$ ssh 'test3@remote.machine'
test3@remote.machine's password:

Can someone please suggest a possible problem with what I'm doing that's preventing this from working?

Thanks in advance,
Sam
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

SFTP in Shell Script with RSA-KEY or password.

I am trying to SFTP to a couple sites. One has an RSA-KEY that was sent to me. Currently I am running that manually using WinSCP. I would like to set it up as a CRON process on our Linux host (Sun). Can I use the rsa-key they sent me in any directory or does it need to be placed in a specific... (2 Replies)
Discussion started by: alemat
2 Replies

2. Shell Programming and Scripting

automating RSA key pair generation

I want to automate the process of generating RSA keys. I want to remotley login to a linux machine from a windows maching without having to enter a password. For this I need to generate the RSA key pair. but I want to do this procedure on alot of linux machines. For which I was looking to automate... (2 Replies)
Discussion started by: lassimanji
2 Replies

3. AIX

Ssh installation error "RSA key generation failed"

While trying to upgrade ssh from v4.7 to v5.0 on AIX 5.3 TL9, I end up with the following error. Has anyone come across this? Note: openssl has been upgraded to 0.9.8.840 before this upgrade Bala (0 Replies)
Discussion started by: balaji_prk
0 Replies

4. AIX

While trying to do ssh without password, rsa key file is created as empty.

Hi i have aix 5.3 operating system, and i am trying to do ssh without passwd, when i tried to create a rsakey, it produces empty file as an output, how can solve that problem? why it is giving empty output file, i tried with different user, situation same,.i have restarted sshd server. .ssh... (2 Replies)
Discussion started by: nibiru78
2 Replies

5. Linux

SSH user equivalency still prompt for password

Hi All, I've followed the exact same steps of how to setup and enable SSH user equivalent including the right permission, but when I "ssh" it still prompts for password. Could you help to see what I did wrong? I appreciate any helps. :confused: server1.com:/u01/oracle RAC1 > mkdir... (2 Replies)
Discussion started by: Beginer0705
2 Replies

6. UNIX for Dummies Questions & Answers

SSH version of rlogin (ie without password prompt)

I have 3 Solaris 10 UNIX servers, the shadow and passwd file are all identical and are automatically sync every 5 minutes. A majority of the users do not have CLI access but rather use a menu. I currently have menu options that allows them to rlogin to another server and I need to have the... (1 Reply)
Discussion started by: creedonjm
1 Replies

7. Programming

Test SSH but do not return password prompt

Hello forum, I want to have a function to test for passwordless SSH setup. Pretty simple. However, what I'm finding difficult is to NOT return a password prompt to screen IF it's not in place. Here's the function: check_passwordless_ssh_working() #check passed parameter, assuming it is... (4 Replies)
Discussion started by: doonan_79
4 Replies

8. UNIX for Advanced & Expert Users

Need Password-Less ssh with RSA-VPN

We have RSA SecureID softtoken key generator on my Windows machine. It generates new keys every 1 minute. Any HPUX server (be it ServerD or ServerP) requires my ID and the randomly generated RSA SecureID softtoken key from my Windows to login. I login to ServerD. Then I run a script... (0 Replies)
Discussion started by: mohtashims
0 Replies

9. UNIX for Dummies Questions & Answers

[SSH-RSA] Still prompting for password after generating keys

Hello, I'm trying to perform these operations without entering any password, as user "fzd":fzd@machine1> scp /tmp/srcFile1 fzd@machine2:/tmp/$destFile fzd@machine1> scp fzd@machine2:/tmp/$srcFile /tmp/$destFilebut alsofzd@machine1> scp /tmp/srcFile1 machine2:/tmp/$destFile fzd@machine1> scp... (6 Replies)
Discussion started by: fzd
6 Replies

10. Red Hat

Sudo Password Prompt over SSH

I am not sure what I am missing here. I have the following identical entry in /etc/sudoers on multiple Red Hat 6.4 servers. icinga ALL=NOPASSWD:/usr/bin/yum --security --exclude\="kernel*" check-update On one server when I enter the command over SSH as follows it works fine. ssh -t -q... (1 Reply)
Discussion started by: scotbuff
1 Replies
SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME
ssh-keysign -- ssh helper program for host-based authentication SYNOPSIS
ssh-keysign DESCRIPTION
ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication. ssh-keysign is disabled by default and can only be enabled in the global client configuration file /etc/ssh/ssh_config by setting EnableSSHKeysign to ``yes''. ssh-keysign is not intended to be invoked by the user, but from ssh(1). See ssh(1) and sshd(8) for more information about host-based authen- tication. FILES
/etc/ssh/ssh_config Controls whether ssh-keysign is enabled. /etc/ssh/ssh_host_dsa_key /etc/ssh/ssh_host_ecdsa_key /etc/ssh/ssh_host_ed25519_key /etc/ssh/ssh_host_rsa_key These files contain the private parts of the host keys used to generate the digital signature. They should be owned by root, read- able only by root, and not accessible to others. Since they are readable only by root, ssh-keysign must be set-uid root if host- based authentication is used. /etc/ssh/ssh_host_dsa_key-cert.pub /etc/ssh/ssh_host_ecdsa_key-cert.pub /etc/ssh/ssh_host_ed25519_key-cert.pub /etc/ssh/ssh_host_rsa_key-cert.pub If these files exist they are assumed to contain public certificate information corresponding with the private keys above. SEE ALSO
ssh(1), ssh-keygen(1), ssh_config(5), sshd(8) HISTORY
ssh-keysign first appeared in OpenBSD 3.2. AUTHORS
Markus Friedl <markus@openbsd.org> BSD
February 17, 2016 BSD
All times are GMT -4. The time now is 08:25 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy