Jess Gabriel y Galn wrote in post #1139477:
> On Tue, Mar 11, 2014 at 12:23 PM, Jaimin Pandya <lists / ruby-forum.com>
> wrote:
>>>
>>
>> previously By using this command -- sudo apt-get install mysql-server
>> mysql-client  I installed MySQL.
>
> This is not the gem, this is the server and a client.
>
>> Is it right to install gem again?
>
> I think you haven't done it yet, so yes, try doing:
>
> gem install mysql

I used "gem install mysql" then I got error:

Fetching: mysql-2.9.1.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
  ERROR: Failed to build gem native extension.

    /home/jaimin/.rvm/rubies/ruby-2.0.0-p353/bin/ruby extconf.rb
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lm... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lz... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lsocket... no
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lnsl... yes
checking for mysql_query() in -lmysqlclient... no
checking for main() in -lmygcc... no
checking for mysql_query() in -lmysqlclient... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
  --with-opt-dir
  --without-opt-dir
  --with-opt-include
  --without-opt-include=${opt-dir}/include
  --with-opt-lib
  --without-opt-lib=${opt-dir}/lib
  --with-make-prog
  --without-make-prog
  --srcdir=.
  --curdir
  --ruby=/home/jaimin/.rvm/rubies/ruby-2.0.0-p353/bin/ruby
  --with-mysql-config
  --without-mysql-config
  --with-mysql-dir
  --without-mysql-dir
  --with-mysql-include
  --without-mysql-include=${mysql-dir}/include
  --with-mysql-lib
  --without-mysql-lib=${mysql-dir}/
  --with-mysqlclientlib
  --without-mysqlclientlib
  --with-mlib
  --without-mlib
  --with-mysqlclientlib
  --without-mysqlclientlib
  --with-zlib
  --without-zlib
  --with-mysqlclientlib
  --without-mysqlclientlib
  --with-socketlib
  --without-socketlib
  --with-mysqlclientlib
  --without-mysqlclientlib
  --with-nsllib
  --without-nsllib
  --with-mysqlclientlib
  --without-mysqlclientlib
  --with-mygcclib
  --without-mygcclib
  --with-mysqlclientlib
  --without-mysqlclientlib


Gem files will remain installed in /home/jaimin/.rvm/gems/ruby-2.0.0-p353/gems/mysql-2.9.1 for inspection.
Results logged to /home/jaimin/.rvm/gems/ruby-2.0.0-p353/gems/mysql-2.9.1/ext/mysql_api/gem_make.out

How to solve this?

Kind regards.