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104
votes
3answers
134k 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 ?
83
votes
3answers
55k 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 ...
73
votes
9answers
64k 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 ...
34
votes
4answers
20k 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, ...
23
votes
2answers
65k 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 ...
11
votes
1answer
2k 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 ...
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
18k 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
478 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
7k 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
3answers
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
1answer
3k 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 ...
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 ...
5
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 ...
5
votes
3answers
16k 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 ...
4
votes
1answer
5k 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
286 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
5k 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 ...
4
votes
2answers
2k views

To use ssh-id-copy do you need both id_rsa.pub and id_rsa?

I am trying to setup a second access ssh key for a friend. He sent me his id_rsa.pub. ssh-copy-id -i id_rsa.pub root@123.123.123.123 /usr/local/bin/ssh-copy-id: ERROR: failed to open ID file ...
3
votes
1answer
1k 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
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 ...
3
votes
1answer
2k 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 ...
3
votes
2answers
154 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
1answer
3k 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
259 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
0answers
114 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
613 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, ...
2
votes
1answer
3k 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
949 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
50 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
2answers
424 views

how to speedup ssh-keygen

We are using beaglebone based custom board. In one of the init script we are generating ssh keys but it takes around 7 seconds to generate the ssh-keys. How do we speedup the process of generating ...
2
votes
1answer
229 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
319 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 ...
2
votes
2answers
57 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
3answers
6k 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. ...
2
votes
1answer
6k views

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

I got @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: UNPROTECTED PRIVATE KEY FILE! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Permissions ...
2
votes
2answers
507 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
2answers
8k views

Remove all the keys (credentials) from a PC

I gonna have to change my Windows PC with a colleague at office. I've added a few rsa ssh keys while playing around with git, github, heroku and a few others. What'd be the best way to remove all my ...
2
votes
1answer
298 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
86 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
133 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
50 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
840 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 ...
2
votes
0answers
429 views

ssh Prompts For Password After Account Unlocked - Despite ssh key?

Here's what happened: I set up ssh key so that user could ssh from A to B without a password. I got user's password wrong in some other context too many times, and user's account got locked out. ...
1
vote
2answers
636 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
3answers
4k 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
5answers
224 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
921 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
281 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 ...