thanhtam92 · August 29, 2015 14:09
diff --git a/error gem file b/error gem file
 When building native ruby gems, sometimes you'll get an error containing "ruby extconf.rb". This is often caused by missing dev libraries for the gem you're installing, or even ruby itself. Do you have apt installed on your machine? If not, I'd recommend installing it, it's a quick and easy way to get a lot of dev libraries. If you see people suggest installing "libmagick9-dev", that's an apt package that you'd install with:

 $ sudo apt-get install libmagickwand-dev
 or on centOs:

 $ yum install ImageMagick-devel
 On mac, you can use Homebrew:

 $ brew install imagemagick
diff --git a/error mysql b/error mysql
 error don't start mysqld:

 ==> delete /var/lib/mysql/ibdata1
	When building native ruby gems, sometimes you'll get an error containing "ruby extconf.rb". This is often caused by missing dev libraries for the gem you're installing, or even ruby itself. Do you have apt installed on your machine? If not, I'd recommend installing it, it's a quick and easy way to get a lot of dev libraries. If you see people suggest installing "libmagick9-dev", that's an apt package that you'd install with:

	$ sudo apt-get install libmagickwand-dev
	or on centOs:

	$ yum install ImageMagick-devel
	On mac, you can use Homebrew:

	$ brew install imagemagick