运行时出现错误：
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 我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 之后出现了错误。
问题可能是什么？