# udevadm info -a -p $(udevadm info -q path -n /dev/ttyUSB0)| grep ATTRS{serial} ATTRS{serial}=="A9KJB1T5" #
create a file in /etc/udev/rules.d/
SUBSYSTEMS=="usb", ATTRS{serial}=="A9KJB1T5" , KERNEL=="ttyUSB?", SYMLINK+="sump", GROUP="dialout"
Then, reload the rules,
~# udevadm control --reload-rules