One killer page to fix most permission issues when using Git

The best way to predict the future is to create it.

Git push failure on error

Symptoms

ERROR: Permission to CloudsDocker/cloudsdocker.github.io.git denied to your_user_id.
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

Solutions

This is because your PSK key are not loaded, you can firslty check

ssh-add -L

If there are something wrong, you can try to start with fresh, to clean all keys and then add your desired key

ssh-add -D
ssh-add ~/.ssh/id_rsa_your_key_name

–HTH–