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I want to use an iPad to connect to a linux server through ssh. However, the server only accepts encrypted access using public-key authentication. Is there any way to do that?
So one question is what app to ssh. The other is how and where to put the key.
I basically want to use vim on the server. And optionally, if possible, gnuplot is also helpful.
In the find file window, press Command-Shift-G. It'll ask you what folder to navigate to. Enter ~/.ssh and press return.
You will need to use a program called PuttyGen.exe on the Windows side to generate a public and private key.
Using the "Generate" button, generate the keys using the above program. You will then need to move the public key that is generated to your mac. Save a copy of the private key to use later using the "Save private key" button.
On your windows machine copy the contents of your public key exactly and paste them in the authorized_keys file you will create below. The easiest way I think is to open an ssh connection using Putty to your mac machine, the first time you will have to enter a username and password. Then create the folders and file structure and use an editor to move the contents. From the putty terminal window connected to your mac enter:
sudo mkdir ~/.ssh
sudo touch ~/.ssh/authorized_keys
sudo chmod 600 ~/.ssh/authorized_keys
Then the editing part of the file you created:
vim ~/.ssh/authorized_keys
Press the i key to insert text. Paste in your public key, and press the keys esc then, :wq to save it.
Now you can re-open Putty and create a new session. On the left hand tab expand SSH and select the Auth tab. Towards the bottom you will need to browse and load in the Private key that you saved earlier.
I got most of this from the help file in PuttyGen.exe the first time I did it. When you open Puttygen.exe there is a Help tab up top.
Best Answer
This is totally feasible.
I would start with an app like prompt by panic that has excellent quality, proper documentation and first rate support.
They say shockingly good software, and I’ve found that to be an understatement as a happy customer for years, paying for many of their products. Prompt is a 5 star app in my book, best of the best for ssh from iOS.