在Ubuntu Server 16.04的fstab中自动挂载VirtualBox共享文件夹

Question

I have Ubuntu Server 16.04 running in VirtualBox on a Windows 10 host. I have VirtualBox guest additions installed and correctly set up shared folders which I am successfully mounting using the "mount" command. I'd like the shared folder to be mounted on system startup, so I added a record to /etc/fstab like:

Projects /home/development/projects vboxsf rw,uid=1000,gid=1000 0 0

However, whenever I add a record to fstab the next reboot I get the emergency mode. Please help

Answer 1

As ugly as it is, this post on the Ubuntu site worked for me. It's not the approved answer, but it worked when others didn't. The problem seems to be the timing--the vbox shares aren't ready when fstab is running, so instead we mount at user login. I'm sure someone will post a better solution for Ubuntu 16 at some point.

Created share point in host:

host$ sudo mkdir -p /path/to/myshare
host$ sudo chown user:user /path/to/myshare

(... added a "myshare" share through VBox UI)

Created mount point in guest:

guest$ sudo mkdir -p /path/to/myshare
guest$ sudo visudo 

Added passwordless sudo permission to mounting in guest:

guest$ sudo visudo

... adding to end:

# Allow mounting without password 
# (hack to allow vbox share mounting to be delayed until user login)
ALL ALL=NOPASSWD: /bin/mount

Added mount action to user ".profile":

guest$ vi ~/.profile

... adding to the end:

sudo /bin/mount -t vboxsf -o uid=$UID,gid=$(id -g) myshare /path/to/myshare

Answer 2

Actually, it is not compulsory to edit the fstab file. Instead, to mount a shared folder using the vboxsf filesystem provided with Guest Additions, we first need to make sure some prerequisites are met as follows:

• Make sure that Guest Additions is properly installed on the guest OS.
• Users in a guest Ubuntu must be in the group vboxsf to be able to access shares.

In recent releases of Virtual Box, we can also automatically mount shared folders on creation (See the image in the answer provided by @the_ousek)

After a reboot of the guest this shared folder will be mounted to the guest directory /media//sf_ accessible to all users who had been made member of the group vboxsf.

More details at https://askubuntu.com/questions/252853/how-to-mount-a-virtualbox-shared-folder-at-startup