hashicorp/vagrant · error · Vagrant::Errors::LinuxMountFailed

Failed to mount folders in Linux guest. This is usually beca

Error message

Failed to mount folders in Linux guest. This is usually because
the "vboxsf" file system is not available. Please verify that
the guest additions are properly installed in the guest and
can work properly. The command attempted was:

%{command}

The error output from the last command was:

%{output}

What it means

Error "Failed to mount folders in Linux guest. This is usually because the "vboxsf" file system is not available. Please verify that the guest additions are properly installed in the guest and can work properly. The command attempted was: %{command} The error output from the last command was: %{output}" thrown in hashicorp/vagrant.

Source

Thrown at plugins/guests/linux/cap/mount_smb_shared_folder.rb:69

#{domain ? "domain=#{domain}" : ""}
EOF
chmod 0600 /etc/smb_creds_#{name}
SCRIPT

          # Attempt to mount the folder. We retry here a few times because
          # it can fail early on.
          begin
            retryable(on: Vagrant::Errors::LinuxMountFailed, tries: 10, sleep: 2) do
              no_such_device = false
              stderr = ""
              status = machine.communicate.sudo(mount_command, error_check: false) do |type, data|
                if type == :stderr
                  no_such_device = true if data =~ /No such device/i
                  stderr += data.to_s
                end
              end
              if status != 0 || no_such_device
                raise Vagrant::Errors::LinuxMountFailed,
                  command: mount_command,
                  output: stderr
              end
            end
          ensure
            # Always remove credentials file after mounting attempts
            # have been completed
            if !machine.config.vm.allow_fstab_modification
              machine.communicate.sudo("rm /etc/smb_creds_#{name}")
            end
          end

          emit_upstart_notification(machine, expanded_guest_path)
        end

        def self.display_mfsymlinks_warning(env)
          d_file = env.data_dir.join("mfsymlinks_warning")
          if !d_file.exist?

View on GitHub (pinned to 35f3160f4a)

When it happens

Trigger: Thrown at plugins/guests/linux/cap/mount_smb_shared_folder.rb:69 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hashicorp/vagrant@35f3160f4a (2026-08-21). Data as JSON: /api/errors/0a4d217093329728. Report an issue: GitHub.