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89
votes
2answers
100k views

How to convert .ppk key to OpenSSH key under Linux?

I know that is possible to convert .ppk under puttygen in Windows, but how to do that on Linux? Is this possible ?
76
votes
3answers
50k views

Using Multiple SSH Public Keys

I have a personal account and a company account on Unfuddle. On Unfuddle SSH keys can only be used on a single account, so I need to create a seperate SSH key on my laptop for both accounts. I ran ...
45
votes
9answers
36k views

How to fix warning about ECDSA host key

I'm trying to setup password-less SSH on an Ubuntu server with ssh-copy-id myuser@myserver, but I'm getting the error: Warning: the ECDSA host key for 'myserver' differs from the key for the IP ...
27
votes
4answers
14k views

How to store SSH keys?

I've started using SSH keys instead of passwords just recently (thanks to GitHub, of course), so please keep in mind that I'm pretty new to this whole concept. Currently my keys simply lay in ~/.ssh, ...
21
votes
2answers
51k views

Connect to server using SFTP and public ssh key using FileZilla on Windows

Is it possible to generate an ssh key on a windows machine then use that key to connect to a server using SFTP via FileZilla? This is all working with my Mac but I have a client that is stuck in a ...
9
votes
1answer
2k views

How safe is it to make my SSH Public key, very public?

Is it a security risk to allow anyone to see your SSH public key? My public key(s) are on all the machines I login to regularly, and I've also given other sysadmins my .pub file so they allow me ...
7
votes
5answers
14k views

How to generate a public/private key (UNIX)

Can some one please tell me, for using SSH, why does a host also need to have a public and private key? And how can I generate a public/private key pair for myself?
7
votes
2answers
396 views

Does the size of a RSA key cipher have any impact on my internet connection?

I am wanting to setup passwordless authentication to my remote linux server, I was going to generate an RSA public/private keypair. I was thinking about cipher strength like 2048 bit and 4096 bit. ...
7
votes
2answers
6k views

Cygwin Connection closed by ::1

During the installation of Hadoop I am trying to setup CYGWIN and ssh. Installed and ssh also started successfully and setup authorization key as instructed HERE but When I try to connect to the ...
6
votes
2answers
3k views

Running ssh-keygen without human interaction?

Would it be possible to run ssh-keygen without human interaction? I have a shell script that takes care of server deployment from start to finish, but ssh-keygen is the only remaining piece that ...
5
votes
4answers
1k views

SSH asks for password, even with public key installed [duplicate]

Possible Duplicate: Problem with shared ssh keys I have set up pub key authentication between two servers. Everything should work, but I am still asked for the password. Here's parts of my ...
4
votes
1answer
4k views

Unable to Change Password for Private SSH Key

I'm running PuTTY Pageant on Windows, and I used it to generate a private SSH key with a .ppk extension. Now I want to change the password to that key, so I opened my Git bash terminal, cd'd to my ...
4
votes
1answer
148 views

Retrieve ssh key from github

I had ssh key at github.com in my account. Now i reinstall my operating system, how can i retrieve my old ssh key from github and put it into /home/user/.ssh/id_rsa? Thank you.
4
votes
4answers
1k views

SSH host authenticity issue

I'm receiving the wonderful "The authenticity of host xx can't be established." message when attempting to SSH into a box. I have two systems that recently swapped names. My system is a RHEL5.6 box. ...
4
votes
2answers
1k views

What is id_rsa.keystore?

In my .ssh directory I have the following files - drwx------ 2 rohit rohit 4096 Jun 22 03:34 ./ drwxr-xr-x 62 rohit rohit 4096 Jun 22 11:16 ../ -rw-r--r-- 1 rohit rohit 402 May 25 15:19 ...
4
votes
3answers
12k views

How to use SSH Public Key with PuTTY to connect to a Linux machine

I am trying to set a public SSH key connection from a Windows 7 machine to a Red-Hat Linux machine. The ultimate purpose is to use pscp (PuTTY's version of scp) from the command terminal w/o the need ...
3
votes
1answer
52 views

“Permission denied (publickey).” after update of Cygwin

I updated Cygwin and I can no longer SSH into any remote machines. Here is the relevant debug output from SSH; What is happening? debug1: Server host key: ssh-rsa ...
3
votes
1answer
315 views

How to use putty for forwarding keys

My situation : - I am connecting from my PC (Windows7) to the server A via (using my private key and my password) with a userA - I'd like to connect from A to the server B via a command ssh: ssh ...
3
votes
2answers
142 views

How can I get the root account to generate an acceptable ssh key?

On an ubuntu machine I did the following: ~$ sudo su - [sudo] password for jamie: root@mydomain:~# ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key ...
3
votes
2answers
295 views

Cat command output varies unusually in regards to * character

I'm running the following command on a fairly standard Ubuntu 11.04 installation running under vSphere: sudo cat /home/*/.ssh/authorized_keys Basically, I am using puppet for ssh key management and ...
3
votes
2answers
3k views

SSH: “Permissions 0644 for 'my_key.pub' are too open.”

Why is 0644 i.e. -rw-r--r-- too open for a SSH key? Also I could not find any false permissions on the .ssh directory (0700) or the home directory (0731). Btw I'm getting this error when testing the ...
3
votes
1answer
2k views

How do I connect to SSH without the password to be requested every time ? - Already follow some answers here but it doesn't work

MAC OS X Lion 10.7.3 1) On host, I've created an authorized_keys file inside .ssh folder, by doing: touch authorized_keys 2) I've copy my public ssh key into host .ssh folder by doing: scp ...
3
votes
1answer
201 views

Use private keys only from ssh-agent, avoiding “Too many authentication failures”

I store all my private keys encrypted in encfs file. I mount (decrypt) encfs file to folder, add all private keys to ssh-agent with a lifetime flag and unmount folder. In this case my private key ...
3
votes
1answer
106 views

Changed home directory permissions on remote server, can no longer ssh into it

I changed the permissions on my ~ directory, and according to this question about ssh and home directory permissions I can no longer ssh into my remote server because it rejects my public key. Is ...
2
votes
1answer
2k views

Tell git which private key to use for a user without home folder

I was reading the question Tell git which private key to use, and the answer doesn't apply for a case were the user doesn't have any home directory. We're setting up a Jenkins server right now, and ...
2
votes
1answer
2k views

Setting up SSH with an existing id_rsa.pub key

I have a client providing me with his own id_rsa.pub key, he wants me to setup a SSH server so that he can send me files. As far as I understand, when I setup my SSH Server (freesshd on Windows) I ...
2
votes
1answer
827 views

Disabling only password ssh access for root

I know it's possible to disallow root logins via ssh, and that it is a Good Idea™ to disallow root to ever login via ssh (preferring instead to use sudo or similar). Is it possible to allow ...
2
votes
2answers
28 views

Global ssh key on server to be used for all accounts

I work for a web development company that also manages the hosting of our customers websites.The hosting is shared and only on 3 servers. The webservers are Debian webservers where each customer has ...
2
votes
1answer
366 views

How to add PEM file as SSH private key to “known hosts”

I have Ubuntu desktop, and I have been given a PEM file (mykey.pem) that is the SSH private key for a Linux server. I am trying to figure out where this PEM file needs to be placed locally on my ...
2
votes
1answer
189 views

SSH file transfers using ssh-keygen

I am a casual linux user but I am having a some difficulty understanding some directions sent to me from a company we provide data to. They want us to use ssh (which I have used before) to transfer ...
2
votes
2answers
2k views

Why does my password for the ssh private key does not work (on Mac)?

I have a pair of private and public keys. The public key is on my server and I have my private key on my local disk. The file's permissions were changed with the command: chmod 600 private_key Now ...
2
votes
2answers
52 views

What do I do after generating SSH keys?

I have 2 Linux machines: My NAS at home and a server off-site. Call my NAS as "NAS" and the offset server "SRV". I need to be able to copy files from SRV to NAS securely, without having to enter a ...
2
votes
1answer
4k views

Why am I getting permission denied (publickey) after chmod 600?

I got @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: UNPROTECTED PRIVATE KEY FILE! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Permissions ...
2
votes
2answers
483 views

Using ssh keys for multiple sites?

I was wondering, is it considered safe to use the same SSH key for multiple sites? (eg. github, bitbucket, heroku, etc)? Or is it recommended to generate a different SSH key for each website/usage?
2
votes
1answer
248 views

Remotely generating key pair without passphrase

I'm trying to generate the key pair (without a passphrase) on a remote machine. The command I use for this is: ssh root@REMOTEIP ssh-keygen -t rsa -f /root/.ssh/id_rsa_new -q -N "" The output of ...
2
votes
1answer
64 views

Something I'm not “getting” about SSH keys: OS portability (Mac to Windows, etc.)

Let's say I create SSH keys in a Mac to connect to my remote server. My server has my public key. My Mac has my private key. So far so good. A few days later, I want to connect to my server by ...
2
votes
0answers
117 views

ssh-add on compute engine ubuntu vm for out going

I have an id_rsa key that I use to connect via scp to a remote server that I've moved to my Ubuntu GCE. I have dropped the key (id_rsa) into main user .ssh folder, chmod 600 but ssh-add won't pick it ...
2
votes
1answer
49 views

Ubuntu unlock ssh key at every usage

I have an SSH private key and I would like to be asked for the password every time if it is used. I don't know how to do this... Thank you!
2
votes
1answer
692 views

Setting up a shared remote git repository without root privileges (solved) using ssh keys to manage per user access?

I'll first explain my setup. I'm working on a non-self managed system on which I have an account without root/elevated privileges. On this system I want to share multiple git repositories to different ...
1
vote
2answers
599 views

Use the same private key git

I have a private key git file in my desktop wich I currently use and I also need to use on my laptop, my question is can I also use the same key in a different computer and if its possible how can I ...
1
vote
6answers
208 views

Is there a way to log into a machine using SSH without password?

I know ssh is to create a secure shell connection to a machine, and we call ssh username@ip_address to login the machine. Is there a way that I won't need to enter the password when connecting via ...
1
vote
1answer
479 views

Can I have more than 1 private key in ~/.ssh?

I am trying to add an existing private key (id_rsa file) to my ~/.ssh directory, but see that I already have one. Do I have to replace the existing key, or is there a way to combine them? I assume ...
1
vote
2answers
200 views

Is there a difference if SSH key is created on serverside?

I've got a server running Ubuntu. I installed openssh-server and wanted to use ssh key for login purposes. Everything works fine except one thing. On Ubuntu's community site is written "This massively ...
1
vote
3answers
3k views

Why is SSH not honoring my authorized keys?

I have 2 laptops at home, both running Ubuntu 12.04 (Desktop), and both using the same NetGear wifi router. I used a technique called "MAC binding" on one of the machines so that the router always ...
1
vote
2answers
211 views

ssh passwordless -login [duplicate]

Possible Duplicate: SSH asks for password, even with public key installed http://rcsg-gsir.imsb-dsgi.nrc-cnrc.gc.ca/documents/internet/node31.html I am trying to login from machine A to ...
1
vote
1answer
313 views

How to use SSH key to commit as collaborator on GitHub?

I'm a collaborator on a private Github repo (owned by someone else), and although I have added an SSH key to my own GitHub account which allows me to authenticate when accessing my own repositories, ...
1
vote
2answers
2k views

SSH ignores keyfile, wrongly asks for password

For work, I am SSH-ing into a server. I haven't done this for months, so something has changed where it now asks me for a password. Previously, after authenticating it would work. Here's what I ...
1
vote
1answer
2k views

How do I copy an SSH key from a Mac to a Windows machine?

I have a public SSH key on my MacBook, but am trying to access a host that requires it on my desktop. How do I do that, and where do I put it on my Windows machine? I am using gitGui on Windows and ...
1
vote
1answer
2k views

How to convert a WinSCP ppk to .CER/.PEM format acceptable by Azure Linux VM?

Googling was fruitless, as most people have a slightly different variation of this problem. I need to write some instructions on how to set up an Azure Linux VM and generate the keys using WinSCP. ...
1
vote
2answers
211 views

why doesnt key authentication work for openssh?

I am working on setting up a hadoop cluster, as per the following tutorial: http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/#sun-java-6 My problem comes in ...