Initial data commit

Task/Hello-world-Line-printer/UNIX-Shell/hello-world-line-printer.sh

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+# Use the default printer queue, with lp(1) or lpr(1).
+#  1. The system must have a printer queue.
+#  2. The printer queue must understand plain text.
+#  3. System V has lp(1). BSD has lpr(1).
+#     CUPS has both lp(1) and lpr(1).
+#
+echo 'Hello World!' | lp
+echo 'Hello World!' | lpr
+
+# Use a character device.
+#  1. The device must understand plain text.
+#  2. You must have write permission for the device.
+#  3. Some systems have /dev/lp0, /dev/lp1, ...
+#  4. BSD has /dev/lpt0, /dev/lpt1, ... for the parallel ports;
+#     and /dev/ulpt0, /dev/ulpt1, ... for the USB printers.
+# Note that intermingling can occur if two processes write to the device at the
+# same time. Using the print spooler method above avoids this problem,
+#
+echo 'Hello World!' >/dev/lp0
+echo 'Hello World!' >/dev/lpt0
+echo 'Hello World!' >/dev/ulpt0