June 2008
Intermediate to advanced
1032 pages
23h 12m
English
book
Mastering UNIX® Shell Scripting: Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus, Second Edition
by Randal K. Michael
Content preview from Mastering UNIX® Shell Scripting: Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus, 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,
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.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.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.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.
Index
SYMBOLS
() (parentheses)
command, 15
double-parentheses mathematical test, 117, 337, 338, 346, 363, 414, 575, 609, 682, 734
& (ampersand)
|& (piping to background), 36, 351, 364
&& (logical AND) operator, 13, 20, 570, 813
background execution, 13
bitwise AND operator, 20
* (asterisk)
multiplication operator, 20
^(caret)
^$ (remove blank lines), 669
^# (remove commented out lines), 669, 858
bitwise exclusive OR operator, 20
start of line, 170, 669, 733, 858, 863
: (colon)
as field delimiter, 157, 159, 167, 536, 537, 569
getops command and, 33, 34, 349, 450, 496
no-op and, 74, 96, 195, 348, 380, 416
$ (dollar sign)
$? (check return code), 29–30, 183–184, 217
$$ (current PID), RANDOM shell variable and, 269, 311, 371, 379, 389
^$ (remove blank line), 669
“$*” (special parameter), 17
“$@” (special parameter), 17
$@ (special parameter), 17
$ (()) command, 15
elapsed time and, 148
$! operator, 44, 144, 145, 147, 546, 547
blank line, 669
command substitution, 19, 80, 88, 97, 127, 128, 331, 484. See also command substitution
variable name and, 15, 28, 304
. (dots)
“ (double quotes)
around variables, 18, 50, 160, 169, 247, 516, 517, 570
command substitution and, 18, 50
command-line switches in, 450
disable command arguments with, 797
special parameters with, 17
usage for, 18
= (equal ...
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.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.