title: error when installing nodemon on Ubuntu 18.04
body: <p>when i install <em>nodemon</em> with</p>
  
  <pre><code>sudo npm i --save-dev nodemon
  </code></pre>
  
  <p>i get the following error message:</p>
  
  <pre><code>npm ERR! path /home/dominikpatera/Dropbox/Projekty/Fytwa/server/node_modules/npm/node_modules/abbrev
  npm ERR! code ENOENT
  npm ERR! errno -2
  npm ERR! syscall rename
  npm ERR! enoent ENOENT: no such file or directory, rename '/home/dominikpatera/Dropbox/Projekty/Fytwa/server/node_modules/npm/node_modules/abbrev' -&gt; '/home/dominikpatera/Dropbox/Projekty/Fytwa/server/node_modules/npm/node_modules/.abbrev.DELETE'
  npm ERR! enoent This is related to npm not being able to find a file.
  npm ERR! enoent 
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /home/dominikpatera/.npm/_logs/2018-07-11T09_45_21_545Z-debug.log
  </code></pre>
  
  <p>can you help me fix it?</p>