Erro ao tentar instalar o zsteg

Question

Ao tentar instalar zsteg no Ubuntu Server ( Linux 4.8.0-49-generic x86_64 ), encontro o seguinte erro:

$ sudo gem install zsteg
Building native extensions.  This could take a while...
ERROR:  Error installing zsteg:
        ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.2/ext
/usr/bin/ruby2.3 mkrf_conf.rb

current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.2/ext
/usr/bin/ruby2.3 -rubygems /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake RUBYARCHDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2 RUBYLIBDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2
/usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError)

rake failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/rainbow-2.2.2 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.2/gem_make.out

ruby2.3, ruby-dev e rake estão instalados

e também tentou:

gem update --system

Se eu não usar sudo , recebo: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /var/lib/gems/2.3.0 directory.

Por favor ajude.

    

Answer 1

Eu apenas reinstalei o rake e o zsteg e funcionou para mim.

1. verifique se você tem o ruby-dev
2. update --system
3. sudo gem install rake
4. sudo gem install zsteg