December 1999
Beginner
528 pages
11h 10m
English
Content preview from Linux and Unix Shell Programming
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Chapter 6. Command execution order
When executing commands, you occasionally need to know that one command has completed successfully or failed before carrying on with another command. For example, suppose you wanted to copy all the files from one directory to another directory, then delete the source directory. You’ll want to know for sure that the copy went OK first before you blitz the original directory, otherwise you could lose all your source directory contents.
In this chapter we will cover:
command execution control; and
command grouping.
The shell has a couple of commands that will not execute the second commands unless the first went OK or execute the second command if the first one failed. The operators that can take care of these ...
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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.
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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.