Linux for Developers

Preface

PART I: OPEN SOURCE SOFTWARE 1
1. Introduction to Open Source Software 3
Defining Source Code 3
Closed Source 4
Open Source 5
“Free” Software 5
Choosing Open Source Licensing 7
Options 8
Key Terms 8
Examples 8
Useful Links 9
Summary 10

PART II: LINUX ESSENTIALS 11
2. Introduction to Linux 13
Accessing a Linux System 13
Choosing the Right Distribution 14
Logging In 15
Using the GUI 18
Basic Command-Line Execution 21
Command-Line Structure 22
Getting Help 22
Summary 28

3. The Filesystem 29
Understanding the Filesystem 29
Learning the Most Used Directories 30
Naming Considerations 30
Navigating the Filesystem 31
Managing the Filesystem 33
Managing Directories 36
Managing Files 37
Summary 45

4. Essential Commands 47
Command-Line Tools 47
Viewing Files 48
Finding Files 52
Comparing Files 54
Shell Features 55
Permissions 57
Developer Tools 59
File Compression Commands 59
The grep Command 62
Summary 66

5. Text Editors 67
The vi Editor 67
Why Learn vi? 68
What Is vim? 68
Essential vi Commands 69
Additional Editors 79
Emacs 79
gedit and kwrite 81
nano and joe 81
lime and bluefish 82
Summary 82

6. System Administration 83
Essential Tasks 83
Gaining Access to the Root Account 84
Displaying Disk Usage 86
Managing Software 88
Listing and Finding Software 89
Installing Software 90
User Accounts 91
Adding User Accounts 91
Modifying User Accounts 92
Deleting User Accounts 93
Understanding Groups 93
Managing Groups 93
Summary 94

PART III: LINUX PROGRAMMING LANGUAGES 95
7. Overview of Linux Programming Languages 97
Scripting Languages 97
BASH Shell Scripting 98
Perl Scripting 99
Python Scripting 100
Additional Scripting Languages 101
Compiled Languages 107
C Programming Basics 107
C++ Programming Basics 108
Java Programming Basics 108
IDEs 108
Summary 109

8. BASH Shell Scripting 111
Basics of BASH Scripting 111
Conditional Expressions 113
Integer Comparisons 115
File Test Comparisons 115
Flow Control Statements 115
The while loop 116
The for Loop 116
The case Statement 117
User Interaction 117
Additional Information 118
Summary 118

9. Perl Scripting 119
Basics of Perl Scripting 119
Executing Perl Code 120
Additional Perl Documentation 121
Variables and Values 122
Flow Control 124
Conditions 126
Additional Features 128
Summary 130

10. Python Scripting 131
Basics of Python Scripting 131
Executing Python Code 132
Additional Documentation 133
Variables and Values 133
Flow Control 136
Conditions 137
Additional Features 137
Summary 138

11. C, C++, and Java 139
Understanding System Libraries 139
Managing Shared Library Files 140
Viewing Shared Library Files 142
Building Packages 142
Building RPM Packages 142
Building Debian Packages 145
Exploring Java Installation and Basics 145
Summary 146

PART IV: USING GIT 147
12. Git Essentials 149
Version Control Concepts 149
The First Generation 149
The Second Generation 149
The Third Generation 151
Installing Git 154
Git Concepts and Features 155
Git Stages 155
Choosing Your Git Repository Host 156
Configuring Git 157
Summary 160

13. Manage Files with Git 161
Basic Configuration 161
git status 162
Handling a Multiple Location Situation 165
Telling Git to Ignore a File 166
Removing Files 168
Handling Branches 169
Pushing Branches 171
Summary 171

14. Manage Differences in Files 173
Executing Diffs 173
Dealing with White Space 175
Comparing Branches 176
Merging Files 178
Summary 182

15. Advanced Git Features 183
Managing Repositories 183
Getting Content from the Remote Server 184
Connecting via SSH 186
Patching 187
Summary 188

Index 189