Skip to Main Content
UNIX® Shells by Example, Third Edition
book

UNIX® Shells by Example, Third Edition

by Ellie Quigley
October 2001
Intermediate to advanced content levelIntermediate to advanced
1040 pages
22h 50m
English
Pearson
Content preview from UNIX® Shells by Example, Third Edition

12.6. Looping Commands

Looping commands are used to execute a command or group of commands a set number of times or until a certain condition is met. The bash shell has three types of loops: the for loop, the while loop, and the until loop.

12.6.1. The for Command

The for looping command is used to execute commands a finite number of times on a list of items. For example, you might use this loop to execute the same commands on a list of files or usernames. The for command is followed by a user-defined variable, the keyword in, and a list of words. The first time in the loop, the first word from the wordlist is assigned to the variable, and then shifted off the list. Once the word is assigned to the variable, the body of the loop is entered, and ...

Become 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,
and much more.
Start your free trial

You might also like

UNIX® Shells by Example Fourth Edition

UNIX® Shells by Example Fourth Edition

Ellie Quigley
Storage Area Networks For Dummies®

Storage Area Networks For Dummies®

Christopher Poelker, Alex Nikitin

Publisher Resources

ISBN: 013066538XPurchase book