Comparing two files

Can anyone create a script for a file comparison?

The pseudo code looks like this

• extract line 5 from file 1
• save it in another variable,
• extract line 5 from file 2,
• save it in another variable,

• if variable 开发者_运维知识库1 is not equal to variable 2 (while allowing for differing characters at positions 11 and 12 from the end of line)

  • then fail
  • else pass

Unix shell? Pass the fileneames as arguments to the following script:

#!/bin/sh
a="$(head -n 5 < $1|tail -n 1)"
b="$(head -n 5 < $2|tail -n 1)"
test "$a" = "$b" && (echo The same; exit 0)
echo Different; exit 1