1. Install *PuttyTools*

        apt-get install putty-tools

2. Generate a `pem` file form the `ppk`

        puttygen server.ppk -O private-openssh -o server.pem  

The file *server.pem* file will be saved on same location

If you&#39;re on a Mac and you&#39;ve previously installed [Homebrew](https://brew.sh/), from Terminal:

    $ brew install putty
    $ puttygen server.ppk -O private-openssh -o server.pem

The first command was suggested in [this comment](https://stackoverflow.com/questions/33273180/create-a-pem-from-a-ppk-file#comment72377609_38854929) and the second from [Emizen Tech&#39;s answer](https://stackoverflow.com/a/38854929/173497).

Try this to install putty-tools

    sudo apt install putty-tools
    puttygen key.ppk -O private-openssh -o key.pem
    ssh -i ~/key.pem {user}@{ip}

First, install PuTTY for Mac using 

    brew install putty

Then, use the following command to convert the .ppk format private key to a standard PEM format private key:

    puttygen privatekey.ppk -O private-openssh -o privatekey.pem

Make sure permissions on the private key file are set properly. It should only be readable by the user that owns it.

    chmod go-rw privatekey.pem

You can now use the key for logins from scripts and command line with:

    ssh -i privatekey.pem user@hostname



I found a strange option in my simulators list in Xcode I&#39;ve never seen before. **Generic iOS Device** in **Build Only Device**

Interesting, but when I try to build for this device - I get error:

    A build only device cannot be used to run this target.
    Please select an available device or choose a simulated device as the destination.

Can anyone explain - for what purposes do I need this option? 

I have Xcode 7.1 and iOS 9.1

[![enter image description here][1]][1]

  [1]: http://i.stack.imgur.com/bR69E.png

What is Generic iOS Device in Xcode 7.1 run destinations list?

When scrolling through the documentation for the [java.util][1] package, I was surpised to find that `Optional&lt;T&gt;` and `OptionalInt` have no relationship to each other. This seems very hard to belive, as it suggests that they are unrelated classes.

 1. Why don&#39;t they have a common interface, class, are sub-types, or *something* to reveal the relationship they have? (They&#39;re *very* similar classes when you look at their uses.)
 2. Also, why the need for an additional `OptionalInt` class? Why can&#39;t you just use `Optional&lt;Integer&gt;`? I thought it was due to the fact that `int` is primitive, but there is no `OptionalChar` so that would be an inconsistent design choice.

  [1]: https://docs.oracle.com/javase/8/docs/api/java/util/package-summary.html

OptionalInt vs Optional&lt;Integer&gt;

So there are plenty of tutorials on how to convert a `PEM` to a `PPK` using `puttyGen`. However my issue is that my windows machine had the only `PEM` copy and I converted it into a `PPK` and deleted it. Now I need to figure out how to convert a `PPK` into a `PEM` so that my mac can `ssh` into the server. I still have access to the server so I could also just make a new key if I had to, anyone know how to convert `PPK` to `PEM`?  

Create a PEM from a PPK file

<p>So there are plenty of tutorials on how to convert a <code>PEM</code> to a <code>PPK</code> using <code>puttyGen</code>. However my issue is that my windows machine had the only <code>PEM</code> copy and I converted it into a <code>PPK</code> and deleted it. Now I need to figure out how to convert a <code>PPK</code> into a <code>PEM</code> so that my mac can <code>ssh</code> into the server. I still have access to the server so I could also just make a new key if I had to, anyone know how to convert <code>PPK</code> to <code>PEM</code>?</p>


I got this permission denied problem when I want to `ssh` to my `ec2` host. I tried existing solution `chmod 600 &quot;My.pem&quot;` but still didn&#39;t work. Here is my debug information:

    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: /etc/ssh/ssh_config line 21: Applying options for *
    debug1: Connecting to 54.223.47.74 [54.223.47.74] port 22.
    debug1: Connection established.
    debug1: key_load_public: No such file or directory
    debug1: identity file My.pem type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file My.pem-cert type -1
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_6.9
    debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
    debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
    debug1: Authenticating to 54.223.47.74:22 as &#39;root&#39;
    debug1: SSH2_MSG_KEXINIT sent
    debug1: SSH2_MSG_KEXINIT received
    debug1: kex: server-&gt;client chacha20-poly1305@openssh.com &lt;implicit&gt; none
    debug1: kex: client-&gt;server chacha20-poly1305@openssh.com &lt;implicit&gt; none
    debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
    debug1: Server host key: ecdsa-sha2-nistp256 SHA256:tfjxcE5kePSv1cJK7SWBp/56kgm2DQkyPLSLZ4d73Io
    debug1: Host &#39;54.223.47.74&#39; is known and matches the ECDSA host key.
    debug1: Found key in /Users/tan/.ssh/known_hosts:24
    debug1: SSH2_MSG_NEWKEYS sent
    debug1: expecting SSH2_MSG_NEWKEYS
    debug1: SSH2_MSG_NEWKEYS received
    debug1: Roaming not allowed by server
    debug1: SSH2_MSG_SERVICE_REQUEST sent
    debug1: SSH2_MSG_SERVICE_ACCEPT received
    debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
    debug1: Next authentication method: publickey
    debug1: Trying private key: My.pem
    debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic
    debug1: No more authentication methods to try.
    Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

EC2 ssh Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

I would like to know how to connect over ssh using a .pem file to any server.

Currently I&#39;m executing the following command:

    ssh user@mydomain.com

What option should I use?

Connect over ssh using a .pem file

I am trying to create a git repository on my web host and clone it on my computer. Here&#39;s what I did:

1. I created a repository on the remote server.
2. I generated a key pair: `ssh-keygen -t dsa`.
3. I added my key to ssh-agent.
4. I copied to the server public key in `~/.ssh`.

And then, after an attempt to run the command `git clone ssh://user@host/path-to-repository`, I get an error:

&gt; Unable to negotiate with XX.XXX.XX.XX: no matching host key type found. Their offer: ssh-dss  
&gt; fatal: Could not read from remote repository.  
&gt; Please make sure you have the correct access rights and the repository exists.

What does that mean?

Unable to negotiate with XX.XXX.XX.XX: no matching host key type found. Their offer: ssh-dss

I&#39;ve got Git for Windows (configured for MinTTY and `PuTTY\plink.exe`) and PuTTY installed, and I am trying to get it to work with a Bitbucket repository. I&#39;ve got my SSH key loaded, in Pageant and on the website, and yet whenever I attempt to do anything that requires pulling/pushing:

    Permission denied (publickey).
    fatal: Could not read from remote repository.

    Please make sure you have the correct access rights
    and the repository exists.

When I run the suggested `ssh -v hg@bitbucket.org` it uses `id_rsa` but none of my other keys in `~/.ssh`. Trying to use `ssh-add ~/.ssh/bitbucket_rsa` results in:

    Could not open a connection to your authentication agent.

I&#39;ve read about configuring PuTTY to allow forwarding, but that&#39;s usually where the advice ends, so I just set this option for the default session and saved it there.

I&#39;ve run `ps` to check which applications were running, and `ssh-agent` was not among them. Running `eval &#39;ssh-agent&#39;` starts the daemon, but it makes no difference.



Git Bash and Pageant are not using keys

I need to run composer update at my hosting so I log in with ssh and try to run the following command inside /www folder where I have Laravel and composer installation:

    composer update

I get this error:

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/FGC01.png

I&#39;m in contact with my hosting provider, they told me to run the command:

    php -d memory_limit=512M composer update

I ran this command but I got: &quot;Could not open file: composer&quot; 

What to do? What is the solution here?

Composer update memory limit

I am trying to set up a connection and transfer files using putty on a windows 10 platform.  I have verified that the default port in putty is 22.  When I run the command in the command line to connect and transfer files though I get the above error.  Any idea why this is or what I should do?

ssh_init: Network error: Cannot assign requested address

I&#39;ve installed openssh for windows and when I run `ssh localhost` I get 
&gt; Bad owner or permissions on C:\\Users\\gary/.ssh/config

I&#39;ve looked at these 2 questions https://superuser.com/questions/348694/bad-owner-or-permissions-error-using-cygwins-ssh-exe and https://serverfault.com/questions/253313/ssh-returns-bad-owner-or-permissions-on-ssh-config but none of the answers work for me.  sshd is running as a service as the Local System user.  I&#39;ve run `chmod 0600 C:\Users\gary\.ssh\config` and `chown gary C:\Users\gary\.ssh\config`.  I&#39;ve also cleared the ACL by running `setfacl -b C:\Users\gary\.ssh\config` and then `chmod 0600 C:\Users\gary\.ssh\config` again.  I&#39;ve also tried changing the owner to SYSTEM and got the same error.

I&#39;m not sure what else to do, is there anything wrong with my setup?  I also have git installed which installed mingw, I deleted ssh and sshd from my git installation so they wouldn&#39;t be on my path.

Other commands I&#39;ve run are
`icacls &quot;C:\Users\gary\.ssh\config&quot; /setowner gary`
`chown -R gary:1049089 C:\Users\gary\.ssh`

`ls -la C:\Users\gary\.ssh\config` shows 
&gt;-rw-r--r-- 1 gary 1049089 229 Jan  3 14:43 &#39;C:\Users\gary\.ssh\config&#39;

it keeps showing this even after changing the owner to SYSTEM, but in the file properties in file explorer it shows SYSTEM as the owner


openssh windows bad owner or permissions

When I try to start the ssh-agent on Windows 10 via PowerShell (with elevated right or without) by entering `Start-Service ssh-agent` I get the error

&gt; unable to start ssh-agent service, error :1058

When I check of the service is running via `Get-Service ssh-agent` is returns that the service is stopped.

How can I get the ssh-agent running?

Starting ssh-agent on Windows 10 fails: &quot;unable to start ssh-agent service, error :1058&quot;

(I am using MAC)

My id_rsa starts with

    -----BEGIN OPENSSH PRIVATE KEY-----

but I expect it to starts with 

    -----BEGIN RSA PRIVATE KEY-----

I have send my id_rsa.pub to server administrator to get the access to server, so I don&#39;t want to generate a new key. 

1. Is there any way that I can transfer my id_rsa which is a openssh private key to a RSA private key?  (command please.)

2. If I can transfer, do I also need to transfer id_rsa.pub? (command please.) It seems id_rsa.pub doesn&#39;t have a header like id_rsa, so I am not sure if I should also transfer this.



Openssh Private Key to RSA Private Key

I have a `.pem` file containing my private key. However, a BitBucket deployment key has this format: 

&gt; ssh-rsa AAAAB3NzaC3yc2EAAAADAQABAAABAQDfZxX2LXOJlo5MP2tLP4fmQyjIAcATwATFKwM6K3mtT7+LKx1jk6YlFlEcj2CFxJHHTy6LCdDqoVzL3iNcD+mDl7NbcNEHytZNJnFQ5lAHPxDVa9ZbLnmP1OlfUvsQS+jAt7yMSwd8gZ6McOJfp9ZUn+r5LLpjYkF+AMQFPsf+6lhSJaOjOTbsA39OJwlnnSO6HF3W2Om+8Bgdpa/E4En5RZTBwFCAvLaaXY3XgN76xCR24TwTWFicBHWeLdADGFXB7OBOv4y805fNGbNKOl3Yb21mG89aUQlYjobeLqImyIrrEhX36hEdMW/t6zZK/1I0QC//uLa+GjJoeuPW4WY3
&gt; ubuntu@Box

It is usually found using: 

`cat ~/.ssh/id_rsa.pub | pbcopy`

How do I extract my public key, in this format, from a `.pem` file? 

Content Type	Original Author	Original Content on Stackoverflow
Question	CMOS	View Question on Stackoverflow
Solution 1 - Ssh	Emizen Tech	View Answer on Stackoverflow
Solution 2 - Ssh	Kenny Evitt	View Answer on Stackoverflow
Solution 3 - Ssh	Jayanta Mukherjee	View Answer on Stackoverflow
Solution 4 - Ssh	Salman Iftikhar	View Answer on Stackoverflow

Create a PEM from a PPK file

Ssh Problem Overview

Ssh Solutions

Solution 1 - Ssh

Solution 2 - Ssh

Solution 3 - Ssh

Solution 4 - Ssh

OptionalInt vs Optional<Integer>

What is Generic iOS Device in Xcode 7.1 run destinations list?

Attributions