All you need is the cross-platform ssh
commandline tools, ssh-keygen
& ssh-copy-id
. git for Windows includes them.
Either do this from the git-installed bash
shell:
#By default this puts keyfile pair in ~/.ssh/id_rsa & ~/.ssh/id_rsa.pub :
ssh-keygen.exe -t rsa -b 2048
ssh-copy-id -i ~/.ssh/id_rsa.pub $remoteuser@$remotehost
# These two chmod lines are needed on unix platforms, probably not on Windows.
# typically ssh refuses to use a private key file
# if it is less-well protected than this:
chmod 700 ~/.ssh
chmod 640 ~/.ssh/id_rsa
Or run this script in PowerShell:
Param(
[Parameter()][string]$keyfile="id_rsa",
[Parameter()][string]$remotehost,
[Parameter()][string]$remoteuser
)
write-host "# ---------------------------------------------------------------------------------#"
write-host "# Create an RSA public/private key pair, and copy the public key to remote server #"
write-host "# #"
write-host "# https://superuser.com/questions/96051 #"
write-host "# ssh-from-windows-to-linux-without-entering-a-password/1194805#1194805 #"
write-host "# #"
write-host "# ---------------------------------------------------------------------------------#"
write-host "Keyfile pair will be saved at : ~/.ssh/$keyfile, ~/.ssh/$keyfile.pub"
write-host "And copied to $remoteuser@$remotehost"
write-host ""
write-host "You will need a password for the copy operation."
write-host ""
if( -not $(ls ~/.ssh) ) { mkdir ~/.ssh }
$sshdir=$(get-item ~/.ssh/).Fullname
#By default this puts keyfile pair in ~/.ssh/id_rsa & ~/.ssh/id_rsa.pub :
ssh-keygen.exe -t rsa -b 2048 -f "$sshdir$keyfile"
# ssh-copy-id somehow didn't work in Powershell so I called it via bash
bash -c "ssh-copy-id -i ~/.ssh/$keyfile.pub $remoteuser@$remotehost"
# I'm not sure if these two chmod lines work on windows but
# typically ssh refuses to use a private key file
# if it is less-well protected than this:
chmod.exe 700 $sshdir
chmod.exe 640 "$sshdir$keyfile"
After this, passwordless login should work for both ssh
and scp
.
1Note: (This wasn't obvious to me.) When opening Pageant, it will open as an icon in the notification area in the bottom right. Right click it, and click Add Key, and select the .ppk file that was generated from puttygen. – badjr – 2018-01-19T15:09:45.170