rbenv：权限被拒绝

Question

我正在跟随Ryan的RailsCast Episode 339。我已经安装了rbenv并可以运行ruby -v。我退出了会话，当我试图重新进入（通过从root转到su deployer），我遇到了这个错误：

/home/deployer/.rbenv/bin/rbenv: line 20: cd: /root: Permission denied

这是 rbenv 文件:

#!/usr/bin/env bash
set -e
[ -n "$RBENV_DEBUG" ] && set -x

resolve_link() {
  $(type -p greadlink readlink | head -1) "$1"
}

abs_dirname() {
  local cwd="$(pwd)"
  local path="$1"

  while [ -n "$path" ]; do
    cd "${path%/*}"
    local name="${path##*/}"
    path="$(resolve_link "$name" || true)"
  done

  pwd
  cd "$cwd"
}

if [ -z "${RBENV_ROOT}" ]; then
  RBENV_ROOT="${HOME}/.rbenv"
else
  RBENV_ROOT="${RBENV_ROOT%/}"
fi
export RBENV_ROOT

if [ -z "${RBENV_DIR}" ]; then
  RBENV_DIR="$(pwd)"
else
  cd "$RBENV_DIR" 2>/dev/null || {
    echo "rbenv: cannot change working directory to \`$RBENV_DIR'"
    exit 1
  } >&2
  RBENV_DIR="$(pwd)"
  cd "$OLDPWD"
fi
export RBENV_DIR


shopt -s nullglob

bin_path="$(abs_dirname "$0")"
for plugin_bin in "${RBENV_ROOT}/plugins/"*/bin; do
  bin_path="${bin_path}:${plugin_bin}"
done
export PATH="${bin_path}:${PATH}"

hook_path="${RBENV_HOOK_PATH}:${RBENV_ROOT}/rbenv.d:/usr/local/etc/rbenv.d:/etc/rbenv.d:/usr/lib/rbenv/hooks"
for plugin_hook in "${RBENV_ROOT}/plugins/"*/etc/rbenv.d; do
  hook_path="${hook_path}:${plugin_hook}"
done
export RBENV_HOOK_PATH="$hook_path"

shopt -u nullglob


command="$1"
case "$command" in
"" | "-h" | "--help" )
  echo -e "rbenv 0.3.0\n$(rbenv-help)" >&2
  ;;
* )
  command_path="$(command -v "rbenv-$command" || true)"
  if [ -z "$command_path" ]; then
    echo "rbenv: no such command \`$command'" >&2
    exit 1
  fi

  shift 1
  exec "$command_path" "$@"
  ;;
esac

第20行是cd "$cwd"

当我试图回到会话时，有什么想法，为什么会出现这个错误？

- Tyler DeWitt

---

似乎你在转换到“deployer”用户时处于“/ root”目录中。请确保你在“deployer”具有访问权限的目录中。 - d11wtq

你说得对。我当时在/root目录下，因为我认为deployer用户应该可以访问该目录，毕竟deployer用户属于管理员组。但是你说得也没错，简单切换目录后，我就能够正确地使用su命令了。如果你想把这个作为答案，我会接受的。谢谢。 - Tyler DeWitt

Answer 1

看起来你在使用"deployer"用户时位于根目录(/root)。请确保你所处的目录是"deployer"有权限访问的。

感谢d11wtq

- Tyler DeWitt

Answer 2

完整步骤：

cd
rm -rf ~/.rbenv
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc

git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
git clone https://github.com/rbenv/rbenv-vars.git ~/.rbenv/plugins/rbenv-vars
exec $SHELL

rbenv -v

rbenv install 3.0.1
rbenv versions
rbenv global 3.0.1

ruby -v

- Astm