Misc: SSH keys README

Setup a passwordless SSH connection using SSH keys

### REMOTE_SERVER=redantig@redantigua.com
REMOTE_SERVER="redantig@kuu.se -p 7822"

Create private/public key pair if needed:

test ! -d ~/.ssh/ && mkdir ~/.ssh/ && chmod 700 ~/.ssh/ 
test ! -e ~/.ssh/id_rsa && ssh-keygen -q -t rsa -N "" -f ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub | ssh ${REMOTE_SERVER} "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 700 ~/.ssh && chmod 600 ~/.ssh/authorized_keys"

Alternative: Use another SSH key type if the remote server does not accept `ssh-rsa`

Generate a ecdsa-sha2-nistp384 key:

ssh-keygen -t ecdsa -b 384
cat ~/.ssh/id_ecdsa.pub | ssh ${REMOTE_SERVER} "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 700 ~/.ssh && chmod 600 ~/.ssh/authorized_keys"

More examples

To access the server using SSH keys (should not ask for password)

ssh $REMOTE_SERVER

Clone

JustHost

    fossil clone ssh://redantig@redantigua.com://home1/redantig/repos/nest.fossil /home/kuuse/fossil/repos/nest.fossil

A2

    ### fossil clone ssh://redantig@a2ss29.a2hosting.com:7822/fossil/repos/nest.fossil /home/kuuse/fossil/repos/nest.fossil
    fossil clone ssh://redantig@kuu.se:7822/fossil/repos/nest.fossil /home/kuuse/fossil/repos/nest.fossil

Problem with `fossil clone` when using non-standard SSH port

The SSH URL syntax when including a port number is ambigous.
This example, using SSH port 7822, works on FreeBSD, but not on MSYS2:

# WORKS ON FREEBSD, FAILS ON MSYS2
fossil clone ssh://redantig@kuu.se:7822/fossil/repos/navbar.fossil navbar.fossil

A workaround is to changed Fossil's ssh-command and then forget about the SSH port completely:

# WORKS ON BOTH FREEBSD AND MSYS2
fossil settings --global ssh-command "ssh -p 7822"
fossil clone ssh://redantig@kuu.se/fossil/repos/navbar.fossil navbar.fossil

For `plink` users on Windows

https://www.ssh.com/ssh/putty/putty-manuals/0.68/Chapter7.html

SSH keys README