December 1998
Beginner
512 pages
12h 13m
English
Content preview from Sams Teach Yourself UNIX® in 24 Hours Second Edition
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Build Your Own Commands
UNIX is remarkably capable and includes hundreds of different commands, but sometimes that's not sufficient. When it becomes time to create your own unique commands, a simple shell script often suffices.
Task 15.1: Shell Variables
 | Programming languages usually include variables, and the shell naturally does too. Variables are just tags to identify values that may change as a program is used. In the shell, these variables can take a single value and are always interpreted as strings. Even numeric values are strings to the shell. |
The C shell and Korn shell both support arrays and have means of representing numeric values. ... |
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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.