Error clone a second repo into config.yml circleci using SSH - ssh

Question

I’ve an automated tests repository and want to put that in a step of build, before to do a deploy.
But the clone repository steps fails (only last run step):
automation:
executor: web-app-executor
steps:
- add_ssh_keys:
fingerprints:
- '<my_fingerprint>'
- run:
name: Trust github ssh
command: >-
GIT_SSH_COMMAND='ssh -i ~/.ssh/id_rsa_myfingerprint'
mkdir -p ~/.ssh
echo 'github.com ssh-rsa <key>
bitbucket.org ssh-rsa <key>
' >> ~/.ssh/known_hosts
- run:
name: Github host
command: ssh-keyscan -p 443 ssh.github.com >> ~/.ssh/known_hosts
- run:
name: Clone automation repository
command: git clone git#github.com:<Domain>/tests-cypress.git
Error:
#!/bin/bash -eo pipefail
git clone git#github.com:Onyo/tests-cypress.git
Cloning into 'tests-cypress'...
The authenticity of host 'github.com (140.82.113.3)' can't be established.
RSA key fingerprint is SHA256:<finger>.

Answer 1

A typical ssh preparation step would involve setting the right protection:
# Prepare SSH
mkdir -p .ssh
chmod 700 .ssh
pushd .ssh
touch authorized_keys # Edit to add allowed connections
touch id_rsa # Edit to add private key
touch id_rsa.pub # Edit to add public key
chmod 600 authorized_keys
chmod 600 id_rsa
chmod 644 id_rsa.pub
popd
In your case, the chmod are missing, which could cause the issue (but the exact error message would be helpful)
Regarding the host authentication, adds as in here:
##
## Use ssh-keyscan to scan the keys of your private server. Replace gitlab.com
## with your own domain name. You can copy and repeat that command if you have
## more than one server to connect to.
##
- ssh-keyscan github.com >> ~/.ssh/known_hosts
- ssh-keyscan bitbucket.org >> ~/.ssh/known_hosts
- chmod 644 ~/.ssh/known_hosts