Ubuntu wrong interpreter: permission denied bundle install

Hello,

Well, there are several things mixed up in your message, so let's try to untangle all that :-)

To start, one should try to install software as much as possible via their package manager (in your case,

apt

) or any software built on it (including the Ubuntu Software Center).

To install

rbenv

:

sudo apt update sudo apt upgrade sudo apt install rbenv

To learn how to use a command, it's best to read its

man

page beforehand by typing in a terminal

man rbenv

(man pages are also available online, here is the man page for

rbenv

).

As indicated on this page,

rbenv

allows you to install and switch between different

ruby

interpreters. In your case, I assume you would need to run:

rbenv init echo 'eval "$(rbenv init -)"' >> ~/.bashrc rbenv install 2.4.5 rbenv global 2.4.5 ruby -v

Can you report back the results of these commands?

Now let's look at some leads (in my opinion, dubious):

/usr/local/bin/bundle

I don't know what it is, but the path suggests that

bundle

(whatever it is) was not installed via

apt

, so it doesn't bode well (or there is a neater way to do it).

If you believe you need this executable, you should install the correct package via

apt

. To find it, you can use

apt-file

:

sudo apt install apt-file sudo apt-file update sudo apt-file search bundle | grep bin/bundle$

On Debian, it is provided by the package

ruby-bundler

, so you would run:

sudo apt install ruby-bundler

#!/home/marie/.rbenv/versions

A script whose first line starts with

#!

has a shebang, which indicates which interpreter (e.g.,

bash

,

python

,

perl

,

ruby

,

php

...) to use to execute the script. This interpreter must be an executable, and is traditionally located in

/usr/bin

(

/bin

for bash). So for example, for a bash script, the shebang would be

#!/usr/bin/bash

.

In this sense, the shebang you indicated in your file seems strange; it doesn't appear to point to an interpreter's path.

The path

/home/marie/.rbenv/versions

probably exists, but since this file does not have execution rights (see

ls -l /home/marie/.rbenv/versions

), it is normal that your shell responds with "Permission denied".

Here are some tips and recommendations when you get a permission error.

• Start by understanding what caused the error:
  • What are the rights associated with the affected file -

    ls -l

    ?
  • What is my current profile -

    whoami

    ?
  • Which groups does it belong to -

    groups

    ?
• Never relax the rights associated with this file (these are usually well defined by default, and relaxing them can open a security hole) - so

  chmod

  and

  chown

  are generally a very bad approach.
• Do not reflexively fall back on

  sudo

  , at least until you understand what you're doing: because as soon as you switch to administrator, a mistake could have dramatic consequences.

/etc/fstab

That's a bad lead someone gave you. Certainly,

/etc/fstab

can explain a permission issue, but here the problem comes from your attempt to execute something that is not an executable.

This file defines how the directory tree

/

is fed from the various devices made available by your system (which includes hard drive partitions): for each device, its mount point (an empty folder) and its mount options (including possible read-only access with the

ro

option) are defined. Similarly, there are options regarding execution (namely, the

exec

and

noexec

options).

In any case, your partitions are normally mounted with default options, so you have no reason to touch them.

For more details, you can read

man fstab

.

Good luck

Hello,

I managed to solve all my problems. In fact, the dual boot I had installed on my computer had an issue. I reinstalled Ubuntu and all the permission-related problems were resolved.

I had another problem with the rbenv command: I couldn't change the version of

ruby

.
When I ran the command

rbenv global 2.6.5

and then

ruby -v

, the version of

ruby

didn't change.

I found the solution on this forum: https://stackoverflow.com/questions/65817956/your-ruby-version-is-2-7-0-but-your-gemfile-specified-3-0-0

Thank you for your quick response and your help, your explanations were really useful to me.