February 2001
Beginner to intermediate
448 pages
9h 2m
English
Content preview from Korn Shell Programming by ExampleBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Echoing Output
One of the first commands a rookie UNIX wizard learns is the echo command. It is a simple program that places the input parameters from the command line on stdout. It's easy enough for anyone to wrap his mind around. The echo command can be used in a pipeline to present input to a utility (as seen in the next example). In scripts, the echo command can be used for prompt display duty, as well as producing standard script output.
The following example uses the echo command to produce the input command stream to the ex editor. The following script uses ex to search for any lines in the file containing a ?. All such lines are deleted when found. This eliminates all processes that are not associated with a terminal (the TTY column contains ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.