Installing rails gives error: cannot load such file — zlib

**adige72** · February 6th, 2013

When i try to install rails in Ubuntu 12.10 i get this error:

Code:

    $ gem install rails
    ERROR: Loading command: install (LoadError)
    cannot load such file -- zlib
    ERROR: While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

So i completely removed rvm:

Code:

rvm implode
    sudo rm -rf ~/.rvm

removed the script calls in my .bashrc and .bash_profile

and checked if they're really removed:

Code:

env | grep rvm #no output, so rvm is removed
    ruby -v #The program 'ruby' can be found in the following packages: blabla

I already have these via sudo apt-get install:

Code:

curl zlib1g-dev zlib1g libssl-dev build-essential openssl libreadline6 libreadline6-dev curl git-core libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion pkg-config

Then proceed to install from scratch

Code:

curl -L https://get.rvm.io | bash -s stable --ruby --auto-dotfiles

then run that line and restarted terminal regard to this message:

Code:

* To start using RVM you need to run `source /home/adige/.rvm/scripts/rvm`
        in all your open shell windows, in rare cases you need to reopen all shell windows.

Then

Code:

rvm pkg install readline

but completed with error:

Code:

...
    Error running 'autoreconf -is --force', please read /home/adige/.rvm/log/readline/autoreconf.log
    ...
    Please note that it's required to reinstall all rubies:
    
        rvm reinstall all --force

I think it's installed anyway, right? Before reinstall all rubies, i installed zlib of course:

Code:

# w/out verify, it gives checksum error
    rvm pkg install zlib --verify-downloads 1

Then run

Code:

rvm reinstall all --force

and completed with error again:

Code:

...
    Install of ruby-1.9.3-p374 - #complete 
    Making gemset ruby-1.9.3-p374 pristine.
    Error running '' under ,
    please read /home/adige/.rvm/log/ruby-1.9.3-p374/gemset.pristine.log
    Making gemset ruby-1.9.3-p374@global pristine.

gemset.pristine.log

Then reinstall ruby with zlib support:

Code:

rvm reinstall 1.9.3-p374 --with-zlib-dir=$rvm_path/usr

which returned same error and same log but completed anyway.

Finally i tried to install rails gem again but

Code:

cannot load such file -- zlib !

Here is the rvm info

What am i doing wrong?

**Mikeb85** · February 6th, 2013

Are you sure you're not missing a zlib library? On openSUSE (what I'm running) there's one called only 'zlib', which doesn't appear in your apt-get install bit...

**adige72** · February 6th, 2013

There is no such package

Code:

adige@adige-LG:~$ sudo apt-get install zlib
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package zlib