ERROR: Error: ERROR installing rails, invalid turails

ERROR: Error: ERROR installing rails, invalid turails

Building native extensions.  This could take a while...ERROR:  Error installing rails:    ERROR: Failed to build gem native extension.    current directory: /var/lib/gems/2.3.0/gems/nokogiri-1.8.2/ext/nokogiri/usr/bin/ruby2.3 -r ./siteconf20180213-11055-1aanqyp.rb extconf.rbchecking if the C compiler accepts ... yesBuilding nokogiri using packaged libraries.Using mini_portile version 2.3.0checking for gzdopen() in -lz... nozlib is missing; necessary for building libxml2*** extconf.rb failed ***Could not create Makefile due to some reason, probably lack of necessarylibraries and/or headers.  Check the mkmf.log file for more details.  You mayneed 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=/usr/bin/$(RUBY_BASE_NAME)2.3    --help    --clean    --use-system-libraries    --enable-static    --disable-static    --with-zlib-dir    --without-zlib-dir    --with-zlib-include    --without-zlib-include=${zlib-dir}/include    --with-zlib-lib    --without-zlib-lib=${zlib-dir}/lib    --enable-cross-build    --disable-cross-buildTo see why this extension failed to compile, please check the mkmf.log which can be found here:  /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/nokogiri-1.8.2/mkmf.logextconf failed, exit code 1Gem files will remain installed in /var/lib/gems/2.3.0/gems/nokogiri-1.8.2 for inspection.Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/nokogiri-1.8.2/gem_make.out

Then I found that rails was not installed. I saw an article in Douban, so I learned how to install zlib.

$sudo apt-get install zlib1g$sudo apt-get install zlib1g.dev

Then install rails.