我跑的时候出错：
vagrant@vagrantup:~$ sudo gem list
ERROR: Loading command: list (LoadError)
no such file to load -- zlib
ERROR: While executing gem ... (NameError)
uninitialized constant Gem::Commands::ListCommand
即使我不使用sudo，也会收到相同的错误消息。
它在Ubuntu 10.4上，我已经安装了zlib库：
vagrant@vagrantup:~$ sudo aptitude search zlib
p gambas2-gb-compress-bzlib2 - The Gambas bzlib2 component
p gambas2-gb-compress-zlib - The Gambas zlib compression component
p haskell-zlib-doc - Compression and decompression in the gzip and zlib formats; documentation
p libcompress-raw-zlib-perl - low-level interface to zlib compression library
p libcompress-zlib-perl - Transitional dummy package for Compress::Zlib
i libghc6-zlib-dev - Compression and decompression in the gzip and zlib formats
v libghc6-zlib-dev-0.5.2.0-d3bd7 -
v libghc6-zlib-doc -
p libghc6-zlib-prof - Compression and decompression in the gzip and zlib formats; profiling libraries
v libghc6-zlib-prof-0.5.2.0-d3bd7 -
p libio-compress-zlib-perl - Transitional dummy package for IO::Compress::Zlib
p libio-zlib-perl - IO:: style interface to gzip/zlib compressed files/handles
p libjzlib-java - reimplementation of zlib in pure Java
i libzlib-ruby - transitional dummy package
v libzlib-ruby1.8 -
p zlib-bin - compression library - sample programs
i zlib1g - compression library - runtime
p zlib1g-dbg - compression library - development
i zlib1g-dev - compression library - development
i zlibc - An on-fly auto-uncompressing C library
我正在使用http://www.vagrantup.com，并且在我安装了rvm后出现错误。
问题是什么？
答案 0 :(得分：3)
如何安装Ruby？如果在没有zlib支持的情况下安装Ruby，那就是问题。
您可以阅读关于在Ubuntu上安装RVM的文章here。在编译Ruby之前必须同时安装zlib和zlib-dev软件包（以及来自Ubuntu的其他软件包）。您可能只需要安装这些并重新编译Ruby。