This program is useful when you know you have to answer a lot of questioned the same answer. This program removes duplicated lines from a sorted file. I'll add more when I have time to think about them. Please send suggestions. Redirecting output to files.
Programs write to the stderr when something goes wrong.
If the file does not exist it creates it. I want to finish the newbie-advanced topics, then X, explain some sysadm stuff, and maybe write something about Unix as a programming env. This is what I had time to do till now. Good Night, Liran.