ruby-on-rails – -bash：ruby：命令未找到

hyperrjas@serv1:~$rbenv global
1.9.3-p392
hyperrjas@serv1:~$rbenv local
1.9.3-p392
hyperrjas@serv1:~$which ruby-build
/usr/local/bin/ruby-build
hyperrjas@serv1:~$rbenv versions
* 1.9.3-p392 (set by /home/hyperrjas/.ruby-version)
hyperrjas@serv1:~$rbenv version
1.9.3-p392 (set by /home/hyperrjas/.ruby-version)
hyperrjas@serv1:~$rbenv rehash
hyperrjas@serv1:~$ruby -v
-bash: ruby: command not found
hyperrjas@serv1:~$env | grep PATH
PATH=/home/hyperrjas/.rbenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
NODE_PATH=/usr/lib/nodejs:/usr/lib/node_modules:/usr/share/javascript
hyperrjas@serv1:~$export PATH="$HOME/.rbenv/bin:$PATH"
hyperrjas@serv1:~$ruby -v
-bash: ruby: command not found

我正在使用ubuntu 12.04.

这是我的?/ .profile文件：

# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1),if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins,install and configure the libpam-umask package.
#umask 022

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
eval "$(rbenv init -)"
eval "$(rbenv init -)"

我用rbenv安装了ruby最后一个版本,当我尝试ruby -v时,我得到-bash：ruby：command not found