I installed protractor using
npm install -g protractor
and then I executed this command:
webdriver-manager update
next, I started it, it works fine and I see this message:
INFO - Selenium Server is up and running
 The problem is that when I try 
protractor config.js
it doesn't work and I get this error:
[launcher] Process exited with error code 1
/usr/local/lib/node_modules/protractor/node_modules/q/q.js:155
            throw e;
                  ^
SyntaxError: Unexpected token )
.
I thought this is because protractor needs node version > 4.~ . So I checked mine I found 0.10.25 so I tried 
sudo npm install -g n
sudo n 4.4.0 
THe installation worked and when I check node -v again it's still 0.10.25
Any help pleaase?!
 
     
    