I was trying to install GitLab using
https://github.com/gitlabhq/gitlabhq/blob/master/doc/install/installation.md
It in the "Configure it" section at
Copy the example Rack attack config
sudo -u git -H cp config/initializers/rack_attack.rb.example config/initializers/rack_attack.rb
with the error
cp: cannot stat `config/initializers/rack_attack.rb.example': No such file or directory