尝试在Ubuntu Server（）上安装zsteg时，Linux 4.8.0-49-generic x86_64遇到以下错误：
$ 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
安装了ruby2.3，ruby-dev和rake
并且还尝试了：
gem update --system
如果我不使用sudo，则会得到：ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /var/lib/gems/2.3.0 directory.
请帮忙。
我刚刚重新安装了rake和zsteg，它对我有用。
update --systemsudo gem install rakesudo gem install zsteg本文收集自互联网，转载请注明来源。
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我来说两句