Git – Suddenly getting “No supported authentication methods available” when pushing to github

You can create a file named ".profile" in your home directory, for me that's C:\Users\[user]

Inside that file, put the following line of code:

GIT_SSH="/usr/bin/ssh.exe"

This will set the GIT_SSH environment variable to use the ssh client included with git.

The .profile script gets executed when you start your Git Bash command line.

Edit: This is my .profile. It will ask you for your password the first time you start the git command prompt, then will remember it from then on, until you reboot your computer. Very handy so you don't have to keep entering your password each time you want to do something.

SSH_ENV="$HOME/.ssh/environment"
GIT_SSH="/usr/bin/ssh.exe"

function start_agent {
echo "Initializing new SSH agent..."
/usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
echo succeeded
chmod 600 "${SSH_ENV}"
. "${SSH_ENV}" > /dev/null
/usr/bin/ssh-add;
}

# Source SSH settings, if applicable
if [ -f "${SSH_ENV}" ]; then
. "${SSH_ENV}" > /dev/null
#ps ${SSH_AGENT_PID} doesn't work under cygwin
ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
start_agent;
}
else
start_agent;
fi

Maybe you just need to commit. I ran into this when I did:

mkdir repo && cd repo
git remote add origin /path/to/origin.git
git add .

Oops! Never committed!

git push -u origin master
error: src refspec master does not match any.

All I had to do was:

git commit -m "initial commit"
git push origin master

Success!