这个问题与this one相反（也问here，here和here）
我安装了两个版本的Ruby

ubuntu:~/environment $ rvm list

       ruby-2.6.6 [ x86_64 ]
    =* ruby-3.0.2 [ x86_64 ]

每次我打开一个终端窗口，ruby-3.0.2（默认值）都被设置。问题是，对于我的一些老项目，我必须使用ruby-2.6.6，所以每次我都必须切换到

rvm use 2.6.6

当我打开特定项目的终端窗口时，有没有办法自动选择ruby 2.6.6？我曾尝试用.ruby-version文件覆盖默认的rvm版本（如建议的here），但它没有做到这一点。

• 编辑 * 文件/home/ubuntu/.rvm/scripts/cd包含以下内容

#!/usr/bin/env bash

# Source a .rvmrc file in a directory after changing to it, if it exists.  To
# disable this feature, set rvm_project_rvmrc=0 in /etc/rvmrc or $HOME/.rvmrc
case "${rvm_project_rvmrc:-1}" in
1|cd)
  # cloned from [email protected]:mpapis/bash_zsh_support.git
  source "$rvm_scripts_path/extras/bash_zsh_support/chpwd/function.sh"

  # not using default loading to support older Zsh
  [[ -n "${ZSH_VERSION:-}" ]] &&
  __rvm_version_compare "$ZSH_VERSION" -gt  4.3.4 ||
  {
    function cd()    { __zsh_like_cd cd    "$@" ; }
    function popd()  { __zsh_like_cd popd  "$@" ; }
    function pushd() { __zsh_like_cd pushd "$@" ; }
  }

  __rvm_after_cd()
  {
    \typeset rvm_hook
    rvm_hook="after_cd"
    if [[ -n "${rvm_scripts_path:-}" || -n "${rvm_path:-}" ]]
    then source "${rvm_scripts_path:-$rvm_path/scripts}/hook"
    fi
  }
  __rvm_cd_functions_set()
  {
    __rvm_do_with_env_before
    if [[ -n "${rvm_current_rvmrc:-""}" && "$OLDPWD" == "$PWD" ]]
    then rvm_current_rvmrc=""
    fi
    __rvm_project_rvmrc >&2 || true
    __rvm_after_cd || true
    __rvm_do_with_env_after
    return 0
  }
  [[ " ${chpwd_functions[*]} " == *" __rvm_cd_functions_set "* ]] ||
  chpwd_functions=( "${chpwd_functions[@]}" __rvm_cd_functions_set )

  # This functionality is opt-in by setting rvm_cd_complete_flag=1 in ~/.rvmrc
  # Generic bash cd completion seems to work great for most, so this is only
  # for those that have some issues with that.
  if (( ${rvm_cd_complete_flag:-0} == 1 ))
  then
    # If $CDPATH is set, bash should tab-complete based on directories in those paths,
    # but with the cd function above, the built-in tab-complete ignores $CDPATH. This
    # function returns that functionality.
    _rvm_cd_complete ()
    {
      \typeset directory current matches item index sep
      sep="${IFS}"
      export IFS
      IFS=$'\n'
      COMPREPLY=()
      current="${COMP_WORDS[COMP_CWORD]}"
      if [[ -n "$CDPATH" && ${current:0:1} != "/" ]] ; then
        index=0
        # The change to IFS above means that the \command \tr below should replace ':'
        # with a newline rather than a space. A space would be ignored, breaking
        # TAB completion based on CDPATH again
        for directory in $(printf "%b" "$CDPATH" | \command \tr -s ':' '\n') ; do
          for item in $( compgen -d "$directory/$current" ) ; do
            COMPREPLY[index++]=${item#$directory/}
          done
        done
      else
        COMPREPLY=( $(compgen -d ${current}) )
      fi
      IFS="${sep}";
    }
    complete -o bashdefault -o default -o filenames -o dirnames -o nospace -F _rvm_cd_complete cd
  fi
  ;;
2|prompt)
  if
    [[ -n "${ZSH_VERSION:-}" ]]
  then
    precmd_functions+=(__rvm_do_with_env_before __rvm_project_rvmrc __rvm_do_with_env_after)
  else
    PROMPT_COMMAND="${PROMPT_COMMAND%% }"
    PROMPT_COMMAND="${PROMPT_COMMAND%%;}"
    PROMPT_COMMAND="${PROMPT_COMMAND:-}${PROMPT_COMMAND:+; }__rvm_do_with_env_before; __rvm_project_rvmrc; __rvm_do_with_env_after"
  fi
  ;;
esac