batch file?

[Butch Bussen]

I know they;'re not called batch files in Linux, but how can I write a 
simple file to do a command I usually type in at the command prompt.  I 
tried putting the line in a file and  I think I set permissions right, but 
it doesn't do anything.  For example I have the command
/home/irlp/scripts/backup_for_reinstall

I'm wanting to put this in a simple file that does this command as a bat 
file would in dos.
Thanks.
73s
Butch Bussen
wa0vjr