March 2002
Beginner
504 pages
10h 47m
English
Content preview from Sams Teach Yourself Shell Programming in 24 Hours, Second EditionBecome 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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Input
Many UNIX programs are interactive and read input from the user. To use such programs in shell scripts, you need to provide them with input in a non-interactive manner. Also, scripts often need to ask the user for input in order to execute commands correctly.
To provide input to interactive programs or to read input from the user, you need to use input redirection. In this section, you will look at the following methods in detail:
Input redirection from files
Reading input from a user
Redirecting the output of one command to the input of another
Input Redirection
When you need to use an interactive command, such as mail in a script, you need to provide the command with input. One method for doing this is to store the input of the command ...
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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.