Linux可以通过udev自动挂载U盘，不过需要注意的是在udev中调用mount指令时会工作不正常，可以使用systemd-mount代替。

参考文档：udev、systemd-mount。

具体步骤：

在/etc/udev/rules.d/目录下新建规则文件

nano /etc/udev/rules.d/50-txfly.rules

输入以下内容，并在/media目录下挂载U盘

KERNEL!="sd*", GOTO="media_by_label_auto_mount_end"

SUBSYSTEM!="block",GOTO="media_by_label_auto_mount_end"

IMPORT{program}="/sbin/blkid -o udev -p %N"

ENV{ID_FS_TYPE}=="", GOTO="media_by_label_auto_mount_end"

ENV{ID_FS_LABEL}!="", ENV{dir_name}="%E{ID_FS_LABEL}"

ENV{ID_FS_LABEL}=="", ENV{dir_name}="%E{ID_FS_UUID}"

ACTION=="add", ENV{mount_options}="relatime,sync"

ACTION=="add", RUN+="/bin/mkdir -p /media/%E{dir_name}", RUN+="/usr/bin/systemd-mount -o %E{mount_options} --no-block --automount=yes --collect /dev/%k /media/%E{dir_name}"

ACTION=="remove", ENV{dir_name}!="", RUN+="/usr/bin/systemd-mount --umount /media/%E{dir_name}", RUN+="/bin/rmdir /media/%E{dir_name}"

LABEL="media_by_label_auto_mount_end"

加载新规则

sudo udevadm control --reload

测试规则：

# lskbl

sda 8:0 1 14.3G 0 disk

mtdblock0 31:0 0 16M 0 disk

mmcblk2 179:0 0 7.3G 0 disk

├─mmcblk2p1 179:1 0 64M 0 part

└─mmcblk2p2 179:2 0 3G 0 part /

mmcblk2boot0 179:32 0 4M 1 disk

mmcblk2boot1 179:64 0 4M 1 disk

mmcblk2rpmb 179:96 0 4M 0 disk

# udevadm test $(udevadm info -q path -n /dev/sda) 2>&1

This program is for debugging only, it does not run any program

specified by a RUN key. It may show incorrect results, because

some values may be different, or not available at a simulation run.

Load module index

Parsed configuration file /usr/lib/systemd/network/99-default.link

Parsed configuration file /usr/lib/systemd/network/73-usb-net-by-mac.link

Created link configuration context.

Reading rules file: /usr/lib/udev/rules.d/50-firmware.rules

Reading rules file: /etc/udev/rules.d/50-txfly.rules

Reading rules file: /usr/lib/udev/rules.d/50-udev-default.rules

Reading rules file: /usr/lib/udev/rules.d/55-dm.rules

Reading rules file: /usr/lib/udev/rules.d/60-autosuspend-chromiumos.rules

Reading rules file: /usr/lib/udev/rules.d/60-block.rules

Reading rules file: /usr/lib/udev/rules.d/60-cdrom_id.rules

Reading rules file: /usr/lib/udev/rules.d/60-drm.rules

Reading rules file: /usr/lib/udev/rules.d/60-evdev.rules

Reading rules file: /usr/lib/udev/rules.d/60-fido-id.rules

Reading rules file: /usr/lib/udev/rules.d/60-input-id.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-alsa.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-input.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage-dm.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage-tape.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage.rules

Reading rules file: /usr/lib/udev/rules.d/60-persistent-v4l.rules

Reading rules file: /usr/lib/udev/rules.d/60-sensor.rules

Reading rules file: /usr/lib/udev/rules.d/60-serial.rules

Reading rules file: /usr/lib/udev/rules.d/61-autosuspend-manual.rules

Reading rules file: /usr/lib/udev/rules.d/64-btrfs.rules

Reading rules file: /usr/lib/udev/rules.d/64-xorg-xkb.rules

Reading rules file: /usr/lib/udev/rules.d/65-libwacom.rules

Reading rules file: /usr/lib/udev/rules.d/70-joystick.rules

Reading rules file: /usr/lib/udev/rules.d/70-mouse.rules

Reading rules file: /usr/lib/udev/rules.d/70-power-switch.rules

Reading rules file: /usr/lib/udev/rules.d/70-touchpad.rules

Reading rules file: /usr/lib/udev/rules.d/70-uaccess.rules

Reading rules file: /usr/lib/udev/rules.d/71-seat.rules

Reading rules file: /usr/lib/udev/rules.d/73-seat-late.rules

Reading rules file: /usr/lib/udev/rules.d/73-special-net-names.rules

Reading rules file: /usr/lib/udev/rules.d/75-net-description.rules

Reading rules file: /usr/lib/udev/rules.d/75-probe_mtd.rules

Reading rules file: /usr/lib/udev/rules.d/78-sound-card.rules

Reading rules file: /usr/lib/udev/rules.d/80-debian-compat.rules

Reading rules file: /usr/lib/udev/rules.d/80-drivers.rules

Reading rules file: /usr/lib/udev/rules.d/80-ifupdown.rules

Reading rules file: /usr/lib/udev/rules.d/80-libinput-device-groups.rules

Reading rules file: /usr/lib/udev/rules.d/80-net-setup-link.rules

Reading rules file: /usr/lib/udev/rules.d/85-hwclock.rules

Reading rules file: /usr/lib/udev/rules.d/90-libinput-fuzz-override.rules

Reading rules file: /usr/lib/udev/rules.d/95-dm-notify.rules

Reading rules file: /usr/lib/udev/rules.d/96-e2scrub.rules

Reading rules file: /usr/lib/udev/rules.d/99-systemd.rules

Invalid inotify descriptor.

DEVPATH=/devices/platform/32e50000.usb/ci_hdrc.1/usb1/1-1/1-1.2/1-1.2:1.0/host0/target0:0:0/0:0:0:0/block/sda

DEVNAME=/dev/sda

DEVTYPE=disk

MAJOR=8

MINOR=0

ACTION=add

SUBSYSTEM=block

ID_FS_UUID=C0F00719F0071576

ID_FS_UUID_ENC=C0F00719F0071576

ID_FS_TYPE=ntfs

ID_FS_USAGE=filesystem

dir_name=C0F00719F0071576

ID_VENDOR=General

ID_VENDOR_ENC=General\x20

ID_VENDOR_ID=8644

ID_MODEL=USB_Flash_Disk

ID_MODEL_ENC=USB\x20Flash\x20Disk\x20\x20

ID_MODEL_ID=8005

ID_REVISION=1.00

ID_SERIAL=General_USB_Flash_Disk_152200000000F9BA-0:0

ID_SERIAL_SHORT=152200000000F9BA

ID_TYPE=disk

ID_INSTANCE=0:0

ID_BUS=usb

ID_USB_INTERFACES=:080650:

ID_USB_INTERFACE_NUM=00

ID_USB_DRIVER=usb-storage

DEVLINKS=/dev/disk/by-path/platform-ci_hdrc.1-usb-0:1.2:1.0-scsi-0:0:0:0 /dev/disk/by-uuid/C0F00719F0071576 /dev/disk/by-id/usb-General_USB_Flash_Disk_152200000000F9BA-0:0

ID_PATH=platform-ci_hdrc.1-usb-0:1.2:1.0-scsi-0:0:0:0

ID_PATH_TAG=platform-ci_hdrc_1-usb-0_1_2_1_0-scsi-0_0_0_0

TAGS=:systemd:

USEC_INITIALIZED=6378678

run: '/bin/mkdir -p /media/C0F00719F0071576'

run: '/usr/bin/systemd-mount -o relatime,sync --no-block --automount=yes --collect /dev/sda /media/C0F00719F0071576'

Unload module index

Unloaded link configuration context.

重新插拔U盘后可以看到：

ls /media

C0F00719F0071576