Shell: cfs - cut sort unique

Below is simple script to cut the specified field ("|" separated) from flat file, sort unique and display.

###### Start Script #############
#!/bin/sh

if [ $# -lt 1 ]
then
echo "Usage: $0 <filed_number> <filename>"
exit;
fi

cut -d"|" -f$1 $2|sort -u

###### End Script ###############

How to run
copy the contents from start script to end script and place in a file named cfs

$ chmod a+x cfs
$ copy the cfs to bin
$ cfs 1,3 filename
523|523
e23|e23
r23|r23
t23|t23
y23|y23