Debian: Automount based on UUID on plugin

This is the easiest way I have found:

http://pkill-9.com/mount-usb-micro-sd-card-linux-automount/

You can create a systemd.mount and systemd.automount unit files. Here is an example:

To mount /dev/sdb1 under /mnt/moutpoint , create a mnt-mountpoint.automount file:

sudo nano /etc/systemd/system/mnt-mountpoint.mount

Note: The name of the unit file should be dir-sub-dir.mount extracted from the mount point /dir/sub-dir (if you need to mount the device under /media the name will be media-mountpoint.mount)

Then paste the following lines:

[Unit]
Description=Mount sdb1

[Mount]
What=/dev/disk/by-uuid/UUID_here
Where=/mnt/mountpoint
Type=auto
Options=defaults

[Install]
WantedBy=multi-user.target

Use blkid to replace the UUID_here with the uuid of /dev/sdb1.

Create the mnt-mountpoint.automount file:

sudo nano /etc/systemd/system/mnt-mountpoint.automount

With the following lines:

[Unit]
Description=Automount usb

[Automount]
Where=/mnt/mountpoint

[Install]
WantedBy=multi-user.target

Attach your USB then enable and start the units:

sudo systemctl daemon-reload
sudo systemctl enable --now  mnt-mountpoint.mount mnt-mountpoint.automount