RSA host key addition


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users RSA host key addition
# 1  
Old 12-16-2009
MySQL RSA host key addition

Guys

How do i add RSA key for a host ?

I was able to connect to a host some time back but now its not connectable ,via SSH.

Message i get is :

Code:
abhi@myHost:~/.ssh> ssh eatcid@yourHost
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
<KEY_PRINTED_HERE>
Please contact your system administrator.
Add correct host key in </myHome/.ssh/known_hosts> to get rid of this message.
Offending key in </myHome/.ssh/known_hosts>:78
RSA host key for 'yourHost' has changed and you have requested strict checking.
Host key verification failed.

I can see 'known_hosts' file under '.ssh' folder in my home dir.
But i do not know how to add this key in here.

I do not think i can simply add the key in this file directly.

Kindly advice.

Regards
Abhi
# 2  
Old 12-16-2009
just remove the host key

It means that you have a saved (cached, if you will) host key in line 78 of known_hosts that conflicts with the current host key sent by the server. Just delete line 78 of your known_hosts file and you should be able to connect. You can also disable strict host key checking altogether in your ssh preferences (~/.ssh/config, man ssh_config).
# 3  
Old 12-17-2009
MySQL

Okay !!

that works !!....but this i am trying manually....

Lets say on Host A ,i nullified "known_hosts" file

What if Host A now needs to connect to Host 1,Host 2.....Host n..... via SSH ,through a script ?

Will the new keys be added automatically ?

Regards
Abhi
# 4  
Old 12-17-2009
Yes, if you disable strict host key checking.

Code:
man ssh_config

should answer any questions you have.

Also, you could add them yourself, check out ssh-keyscan.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Rsa public private key matching

Hi All, I have a requirement where i need to check if an rsa public key corresponds to a private key and hence return success or failure. Currently i am using the command diff <( ssh-keygen -y -e -f "$PRIVKEY" ) <( ssh-keygen -y -e -f "$PUBLICKEY" ) and its solving my purpose. This is in... (1 Reply)
Discussion started by: mritusmoi
1 Replies

2. Red Hat

How to use rsa key for a different user?

Hi All, I have a scenario where from machine1 I need to establish sftp/ssh to machine2. Internet is full of examples of this how to generate they key-pair etc... but all examples assume that the account is the same on machine1 and machine2. I would like to do the following: 1) user1 on... (3 Replies)
Discussion started by: snailrider
3 Replies

3. Cybersecurity

Help troubleshooting RSA Key login attempts

I'm stumped on an issue I'm having with RSA key based SSH logons. I have 30 servers in a database cluster. They are all Red Hat Enterprise Linux Server release 6.4. I want to be able to run a command on all of them from any one of them using SSH. I generated private and public keys on... (1 Reply)
Discussion started by: derndingle
1 Replies

4. Shell Programming and Scripting

Bash script to create rsa key pair

Hello all, I am setting up a cluster of Mac Pro's which need to be able to talk to a master computer, traffic between the nodes and the master needs to take place without a ssh key. I need a script that will create a security key, save it to the default place, enter the password as no password.... (2 Replies)
Discussion started by: sdl27789
2 Replies

5. UNIX for Dummies Questions & Answers

How to change the RSA key fingerprint?

Hi there, I have a Linux Debian machine with the following fingerprint : e1:95:11:46:ff:d1:e3:4a:a3:34:1a:25:b4:d8:f1:cb. I'd like to set this fingerprint to : cd:19:bd:f6:8e:00:7a:69:14:52:a1:73:cb:15:a5:ca. I have very specific reasons to do that. So please only answer if you know how... (5 Replies)
Discussion started by: chebarbudo
5 Replies

6. 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

7. Linux

RSA decrypt with public key ?

Dear All, I need to decrypt with private key most of the time and this works for RSA. At times I need to decrypt with public key (data is encrypted with private key). This does not seem to work via VB.Net. Is there support for such an activity in Java on Linux or Windows ? Please advise. ... (3 Replies)
Discussion started by: Sushma Y
3 Replies

8. 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

9. Shell Programming and Scripting

RSA key fingerprint needs to be avoided.

Hi All, I need to scp a folder from one host to another in a script. When I run a command , it asks me to authenticate for the RSA key fingerprint for the first time. # scp -r temp1 root@iqcarrot:/root/ The authenticity of host 'iqmango.apac.avaya.com (148.147.172.112)' can't be... (2 Replies)
Discussion started by: nua7
2 Replies

10. UNIX for Dummies Questions & Answers

Register RSA Key fingerprint with JVM 1.4.2

Hi, We wish to register RSA key fingerprint with JVM 1.4.2 under UNIX environment. Any inputs how to go for it? The output we are getting as "The authenticity of host 'sxfer01.bluecrossmn.com (159.136.224.30)' can't be established. RSA key fingerprint is... (0 Replies)
Discussion started by: asawari
0 Replies
Login or Register to Ask a Question