Working With OpenSSH

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Use the detailed instructions to set up SSH access with OpenSSH from a host running Linux, OS X, or from Windows using Cygwin or Git Bash.

The necessary tools for SSH access are already installed on Linux and OS X systems. They are also included in Cygwin on Windows if the openssh package is selected at installation time, and they come with Git Bash, which is actually a scaled down version of Cygwin.

Generating an SSH Key Pair

On these systems many developers already have an SSH key generated and in use. If you do not already have one, you will need to generate one with ssh-keygen as follows on the system where you will be running Wing Pro. On Windows, these commands need to be executed in the Cygwin or Git Bash terminal and not the Windows Console:

mkdir ~/.ssh
chmod 700 ~/.ssh
ssh-keygen -t rsa

Use the default settings and enter a password for encrypting the private key. This will produce ~/.ssh/id_rsa (private key file) and ~/.ssh/id_rsa.pub (public key file).

Moving the SSH Public Key to the Remote Host

A copy of the public key needs to be transferred to the remote host you want to connect to and added to ~/.ssh/authorized_keys. The following is one way to accomplish this:

ssh username@remotehost "mkdir .ssh; chmod 700 .ssh"
ssh username@remotehost "sed -i -e '$a\' .ssh/authorized_keys"
scp ~/.ssh/id_rsa.pub username@remotehost:.ssh/pub.tmp
ssh username@remotehost "cat .ssh/pub.tmp >> .ssh/authorized_keys; rm .ssh/pub.tmp"

The first line above is only needed if you do not already have the directory ~./ssh on the remote system. The second line is only needed if you already have ~.ssh/authorized_keys on the remote system, to ensure that it ends in a newline so your added key is on its own line. The third and fourth lines transfer the public key to the remote host and add it as a key that is authorized to log in without entering a password.

Loading the SSH Private Key into the User Agent

Wing expects you to use an SSH user agent to store your private keys, so that ssh can access them as needed without having to prompt you for a password. If you normally use a command like ssh -i mykey.pem user@remote to connect to your remote host, you will need to instead load your key into the user agent.

To do this, run ssh-add on the host where the IDE is running. You will be prompted for the encryption password for the private key, if any, and then the key will be loaded into the user agent.

On OS X Sierra or newer, you will need to add the following to your ~/.ssh/config to tell ssh to communicate with Keychain Access:

Host *
  UseKeychain yes
  AddKeysToAgent yes

On Cygwin you will first need to run ssh-agent bash and then ssh-add because ssh-agent is not running by default.

Now you should be able to connect to the remote host without having to enter a password as follows:

ssh username@remotehost

Using a Non-Default SSH Port

If your remote server is running SSH on a non-default port, then you will also need to edit your SSH configuration on the host where the IDE is running to set that port. This is done in ~/.ssh/config with an entry that looks like this:

host myhost.mydomain.com
   port 8022