grep Pocket Reference

Table of Contents......Page 4
Introduction......Page 5
Conventions Used in This Book......Page 6
Using Code Examples......Page 7
Comments and Questions......Page 8
Conceptual Overview......Page 9
Introduction to Regular Expressions......Page 11
Quotation Marks and Regular Expressions......Page 12
Metacharacters......Page 13
POSIX Character Classes......Page 24
Crafting a Regular Expression......Page 25
grep Basics......Page 28
Basic Regular Expressions (grep or grep -G)......Page 31
Match Control......Page 32
General Output Control......Page 33
Output Line Prefix Control......Page 35
Context Line Control......Page 37
File and Directory Selection......Page 38
Other Options......Page 41
Extended Regular Expressions (egrep or grep -E)......Page 42
Fixed Strings (fgrep or grep -F)......Page 45
Perl-Style Regular Expressions (grep -P)......Page 47
Character Types......Page 49
Character Properties......Page 50
PCRE Options......Page 52
Introduction to grep-Relevant Environment Variables......Page 53
When to Use grep -E......Page 58
When to Use grep -P......Page 59
Performance Implications......Page 60
Advanced Tips and Tricks with grep......Page 61
Backreferences......Page 62
Binary File Searching......Page 63
Useful Recipes......Page 65
IP addresses......Page 66
U.S.-based phone numbers......Page 67
Credit card numbers......Page 68
Searching through large numbers of files......Page 69
Matching strings across multiple lines......Page 70
References......Page 71
Index......Page 73