Brew and gem both throw "Allow Denied" error whenever I run it

This happens when I run "gem" or "brew":

/Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:75:in `initialize': Permission denied - /Library/Ruby/Gems/2.0.0/specifications/cocoapods-plugins-0.4.2.gemspec (Errno::EACCES)
from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:75:in `open'
from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:75:in `data'
from /Library/Ruby/Site/2.0.0/rubygems/stub_specification.rb:178:in `valid?'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:731:in `block in each_stub'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:723:in `block (2 levels) in each_gemspec'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:722:in `each'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:722:in `block in each_gemspec'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:721:in `each'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:721:in `each_gemspec'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:729:in `each_stub'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:748:in `stubs'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:705:in `_all'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:894:in `each'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1010:in `reverse_each'
from /Library/Ruby/Site/2.0.0/rubygems/specification.rb:1010:in `latest_specs'
from /Library/Ruby/Site/2.0.0/rubygems.rb:470:in `find_latest_files'
from /Library/Ruby/Site/2.0.0/rubygems.rb:983:in `load_plugins'
from /Library/Ruby/Site/2.0.0/rubygems/gem_runner.rb:81:in `<top (required)>'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /usr/bin/gem:9:in `<main>'

      

        
        
        
      

    

I also installed cocoapods and when I checked the folder (/Library/Ruby/Gems/2.0.0/specifications/):

-rw-------   1 root  wheel  1599 Apr  9 22:41 cocoapods-plugins-0.4.2.gemspec
-rwxr-xr-x   1 root  wheel  1376 Jun 27  2014 cocoapods-trunk-0.1.3.gemspec
-rwxr-xr-x   1 root  wheel  1376 Sep  4  2014 cocoapods-trunk-0.1.4.gemspec
-rw-------   1 root  wheel  1290 Apr  9 22:41 cocoapods-trunk-0.6.0.gemspec
-rwxr-xr-x   1 root  wheel   980 Apr 27  2014 cocoapods-try-0.2.0.gemspec
-rwxr-xr-x   1 root  wheel   980 Jun 27  2014 cocoapods-try-0.3.0.gemspec
-rw-------   1 root  wheel   980 Apr  9 22:41 cocoapods-try-0.4.3.gemspec

      

        
        
        
      

    

I don't seem to have read-r permission and they all worked fine when I use sudo, does anyone know what I did wrong? either as i installed gem or ruby, sorry i am full n00b for ruby ​​and gems. My gem team lives in '/ usr / bin / gem' and my brew team lives in 'usr / local / bin / brew' Thanks a lot!