I saved this file as test.awk. Then I did chmod 555 test.awk so anybody can read and execute the script. Then ./test.awk /etc/passwd to test it on the password file.

#!/bin/bash

#search for lines that have sh in it
awk /sh/'

#This begin section allows you to initialize and set global varibles in awk
BEGIN{
#don't have any code to put in here
}

#this is the main body if you want to do a operation on each line in the file
{
#don't have any code to put in here
}

#this section only execute at the end of the script of awk
END{
print "Script finished"
}
' "$1" #this will get the first argument from the command. I directed it to /etc/passwd. Notice I put quotes around it incase there is spaces in the file name

Here is the actually code because you can't put # inside the ' ' that is syntax error. Everything has to before the single quotes.

Very good !