# Can't install rails. gem zlib crc error

**URL:** <https://www.ruby-forum.com/t/cant-install-rails-gem-zlib-crc-error/133912>\
**Category:** Rails\
**Created:** [April 4, 2008, 9:36pm UTC](https://www.ruby-forum.com/t/cant-install-rails-gem-zlib-crc-error/133912 "2008-04-04T21:36:27Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![spross](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/a9adbd/32.png) [@spross](https://www.ruby-forum.com/u/spross)\
**Post date:** [April 4, 2008, 9:36pm UTC](https://www.ruby-forum.com/t/cant-install-rails-gem-zlib-crc-error/133912/1 "2008-04-04T21:36:27Z")

</div>

hi all

i’m trying to install ruby on rails on my debian server. i didn’t use  
apt-get. i installed everything from source. i used this tutorial  
(without PD-Admin):  
[http://railswiki.de/Ruby\_on\_Rails\_auf\_einem\_Debian\_Server\_installieren](http://railswiki.de/Ruby_on_Rails_auf_einem_Debian_Server_installieren)

now i can’t install rails over gem, i’m getting this zlib crc error:

root@co2:~# gem install rails --include-dependencies --verbose –  
backtrace  
INFO: `gem install -y` is now default and will be removed  
INFO: use --ignore-dependencies to install only the gems you list  
ERROR: While executing gem … (Zlib::GzipFile::CRCError)  
invalid compressed data – crc error  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/package.rb:508:in `close' /usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:508:in `initialize’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/package.rb:445:in  
`each_entry' /usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:439:in `loop’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/package.rb:439:in  
`each_entry' /usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:424:in `each’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/package.rb:485:in  
`initialize' /usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:582:in `new’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/package.rb:582:in  
`open_from_io' /usr/local/lib/ruby/site_ruby/1.8/rubygems/package.rb:802:in `open\_from\_io’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/format.rb:69:in `from_io' /usr/local/lib/ruby/site_ruby/1.8/rubygems/format.rb:52:in `from\_file\_by\_path’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/dependency\_installer.rb:  
104:in `find_gems_with_sources' /usr/local/lib/ruby/site_ruby/1.8/rubygems/dependency_installer.rb: 103:in `each’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/dependency\_installer.rb:  
103:in `find_gems_with_sources' /usr/local/lib/ruby/site_ruby/1.8/rubygems/dependency_installer.rb: 196:in `gather\_dependencies’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/dependency\_installer.rb:  
195:in `each' /usr/local/lib/ruby/site_ruby/1.8/rubygems/dependency_installer.rb: 195:in `gather\_dependencies’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/dependency\_installer.rb:  
91:in `initialize' /usr/local/lib/ruby/site_ruby/1.8/rubygems/commands/ install_command.rb:69:in `new’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/commands/  
install\_command.rb:69:in `execute' /usr/local/lib/ruby/site_ruby/1.8/rubygems/commands/ install_command.rb:67:in `each’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/commands/  
install\_command.rb:67:in `execute' /usr/local/lib/ruby/site_ruby/1.8/rubygems/command.rb:136:in `invoke’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/command\_manager.rb:104:in  
`process_args' /usr/local/lib/ruby/site_ruby/1.8/rubygems/command_manager.rb:74:in `run’  
/usr/local/lib/ruby/site\_ruby/1.8/rubygems/gem\_runner.rb:39:in `run’  
/usr/local/bin/gem:22

somebody any idea, what the problem is?

thanks in advance!

---

<div class="post-metadata">

**Author:** ![spross](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/a9adbd/32.png) [@spross](https://www.ruby-forum.com/u/spross)\
**Post date:** [April 7, 2008, 7:44pm UTC](https://www.ruby-forum.com/t/cant-install-rails-gem-zlib-crc-error/133912/2 "2008-04-07T19:44:46Z")

</div>

Hi.

Did you found a solution for this problem?  
I got the same problem on debian and searched already a lot for  
solutions.

## I found only that you may haven’t installed zlib. You can check this via:

# ruby -e “puts(require(‘zlib’))”

## true

Unfortunately i get true back, but still got this error. Has anyone a  
idea?

## Here are my details:

# gem env

RubyGems Environment:

- RUBYGEMS VERSION: 1.1.0 (1.1.0)
- RUBY VERSION: 1.8.6 (2007-03-13 patchlevel 0) [x86\_64-linux]
- INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8
- RUBY EXECUTABLE: /usr/local/bin/ruby
- RUBYGEMS PLATFORMS:
  - ruby
  - x86\_64-linux

- GEM PATHS:
  - /usr/local/lib/ruby/gems/1.8

- GEM CONFIGURATION:
  - :update\_sources =\> true
  - :verbose =\> true
  - :benchmark =\> false
  - :backtrace =\> false
  - :bulk\_threshold =\> 1000

- REMOTE SOURCES:
  - [http://gems.rubyforge.org](http://gems.rubyforge.org)

# uname -a

## Linux vadmin408 2.6.18-xen #2 SMP Fri Aug 24 20:31:36 CEST 2007 x86\_64 GNU/Linux

thx

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<div class="post-metadata">

**Author:** ![spross](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/a9adbd/32.png) [@spross](https://www.ruby-forum.com/u/spross)\
**Post date:** [April 9, 2008, 1:29pm UTC](https://www.ruby-forum.com/t/cant-install-rails-gem-zlib-crc-error/133912/3 "2008-04-09T13:29:56Z")

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Hi

yes, you have to install the ruby1.8-dev package from apt-get. this  
problems are because of mixing apt-get with rails 2.0…

On 7 Apr., 19:44, Hinnerk G. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)