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+====== Renaming USB serial devices ======
+When you connect an **usb-serial** adapter to a GNU/Linux host, it gets named something like **ttyUSB0**. Other similar devices get the name with subsequent numbers: **ttyUSB1**, **ttyUSB2**, etc. If you want a predictable device name, you can use **udev rules**.
+In the following examples you can assign a predictable name by **USB slot position** or by **vendor/product** of the USB adapter.
+Once the device is connected, inspect the udev subsystem about it;
+<code>
+udevadm info -a -p  $(udevadm info -q path -n /dev/ttyUSB0)
+</code>
+You can choose among many attributes to identify the device.
+The following example will identify the device by the USB position, which is also reported by **dmesg**:
+<code>
+usb 1-2.3: pl2303 converter now attached to ttyUSB0
+</code>
+Create a file **/etc/udev/rules.d/10-local.rules** with the following line:
+<file>
+ACTION=="add", SUBSYSTEMS=="usb", KERNELS=="1-2.3", SYMLINK+="usbserial_A"
+</file>
+Otherwise you can select by vendor/product, with another line like this one:
+<file>
+ACTION=="add", ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", SYMLINK+="usbserial_B"
+</file>
+Let the udev subsystem to re-read the rules:
+<code>
+udevadm trigger
+</code>
+Now, when you plug the USB adapter, a symlink will be created **%%/dev/usbserial_A -> ttyUSB0%%**.
+If more than one rule match, more than one symlink will be created.