polegone

No problem.

I linked it in the readme so all those people visiting my project will see yours.

I can't help much myself (you are way ahead of me), but more people should visit your project now.

I tested it by on a several megabyte text file (not that large) and I can see a huge improvement in speed when I use a reader vs. loading the whole thing into memory as I did at first.

I can see now how much of a difference it can make on a really large file, like in the gigabyte range.

BTW, I deleted my earlier comment because the problem I had wasn't anything to do with bufio. I had just made an obvious mistake elsewhere in my code, which I've fixed now.

I am a novice, and that is one of the reasons why I started this project (to learn).

I must say that yours is much more complete than mine, though.

I'm working on that as well. I just fixed cat to crash and log on error, and I'll be fixing the other commands soon.

By the way, I'm wondering how I should go through the file line by line with a reader.

I think the most efficient way may be to scan byte by byte from the start (head) or the end (tail), and count until reaching n amount of newlines (or stop if at the end of the file), then print the bytes between the start/end and the nth newline.

How does this sound?

Thank you. I will look into this.

I'm just doing this for fun and to learn about Go and Unix at the same time.

I am a beginner, and a lot of my code is inefficient and/or incomplete, but by putting it on the Internet I can get criticism and find out where I went wrong.

For instance, some of you have told me that the way I've been reading files is very inefficient, so now I'll try and do it the correct way.