title: zsh: permission denied: /Users/..; gem install rails ERROR: While executing gem ... (Errno::EACCES) Permission denied @ rb_sysopen - /Users/
body: <p>I have a course this weekend where we´re learning to use ruby on rails. We were supposed to install everything for it and then run &quot;gem install rails&quot; to check, if it worked (I guess).
  If I do so, I just get the following error:
  gem install rails
  ERROR:  While executing gem ... (Errno::EACCES)
  Permission denied @ rb_sysopen - /Users/..
  I already tried to uninstall everything, but after installing it again I still get the same error. Can someone help me please?</p>
  <p>Also if I try to copy any dokument into my terminal, I always get the error: zsh: permission denied: /Users/..</p>
  <p>I am total beginner and right now have no idea what I´m doing, so please be kind if it is a stupid question:D</p>
  <p>Thanks in advance
  Anna</p>