Hmm… error msg makes me suspect that the cmd is expecting me to be using a public key to authenticate with GitHub, but I use a password: BTW, $ git remote add upstream git@github.com:TEIC/TEI.git $ git pull upstream dev The authenticity of host 'github.com (140.82.114.4)' can't be established. RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'github.com,140.82.114.4' (RSA) to the list of known hosts. git@github.com: Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. BTW, did you actually mean the username “git”? Just in case I tried with “sydb”, too; same error. ________________________________ git remote add upstream git@github.com:TEIC/TEI.git (if you haven’t already done this) git pull upstream dev ought to do the trick.