Index

A

• aliases / Environment variables and aliases
• archive
  • testing / Testing an archive
• automatic backups / Automatic backups

B

• backup
  • creating / Making a current backup of your work, Chapter 4 – Script 7
• backups
  • verifying / Verifying backups

C

• code
  • indenting / Indenting your code, Chapter 3 - Script 6
• command piping / Command piping, Chapter 4 - Script 3
• commands
  • creating, from template / Creating new commands from a template, Chapter 10 – Script 2
• comparison operators
  • for strings / Comparison operators for strings, Chapter 2 - Script 3, Chapter 2 - Script 4, Chapter 2 - Script 5
• Computer Backup Script / Creating numbered backup files
• conditional statements
  • used, for validating parameters / Validating parameters using conditional statements, Chapter 2 - Script 2
• cron / Cron
• crontab / Cron
• curl options / curl options, Chapter 8 - Script 2
• curl program / curl

E

• environment variables / Environment variables , Chapter 2 - Script 6, Chapter 2 - Script 7, Environment variables and aliases

F

• file checksums / File checksums
• file encryption / File encryption, Chapter 7 - Script 7
• file redirection / File redirection
• files
  • writing / Writing files, Chapter 7 - Script 1, Chapter 7 - Script 5
  • reading / Reading files, Chapter 7 - Script 2, Chapter 7 - Script 3, Chapter 7 - Script 4, Reading and writing files, Chapter 7 - Script 5
  • writing, interactively / Reading and writing files interactively, Chapter 7 - Script 6
  • reading, interactively / Reading and writing files interactively, Chapter 7 - Script 6
• for statement
  • using / Using the for statement, Chapter 3 - Script 7, Chapter 3 - Script 8

I

• interactive scripts
  • creating / Chapter 5 - Script 1, Chapter 5 - Script 2, Chapter 5 - Script 3, Chapter 5 - Script 4, Chapter 5 - Script 5, Chapter 5 - Script 6, Chapter 5 - Script 7, Chapter 5 - Script 8
• Internal Field Separator / Chapter 7 - Script 3
• Internet service provider (ISP) / ssh and scp

L

• logic errors / Logic errors, Chapter 9 - Script 4
• loop
  • using / Using loops, Chapter 3 - Script 1, Chapter 3 - Script 2, Chapter 3 - Script 3
  • leaving / Leaving a loop early, Chapter 3 - Script 9

N

• numbered backup files
  • creating / Creating numbered backup files, Chapter 3 – Script 13

P

• parameters
  • validating, conditional statements used / Validating parameters using conditional statements, Chapter 2 - Script 2
  • using / Using parameters, Chapter 4 - Script 5, Chapter 4 - Script 6
• process
  • watching / Watching a process, Chapter 3 - Script 12
• progress indicator / Progress indicator, Chapter 10 - Script 1

R

• recursion / wget and recursion

S

• scp / ssh and scp
• screen
  • clearing / Clearing the screen, Chapter 4 - Script 1
• screen manipulation / Screen manipulation, Chapter 3 - Script 4, Chapter 3 - Script 5
• scripts
  • demonstrating / Demonstrating the use of scripts, Chapter 1 - Script 1, Chapter 1 - Script 2, Chapter 1 - Script 3, Chapter 1 - Script 4, Chapter 1 - Script 5
  • variable, using in / Using variables in scripts
  • variables, using in / Using variables in scripts, Chapter 2 - Script 1
  • tasks, automating with / Chapter 6 - Script 1, Chapter 6 - Script 2
  • for checking user login / Chapter 6 - Script 3, Chapter 6 - Script 4
  • running, as root / Chapter 6 - Script 5, Chapter 6 - Script 6, Chapter 6 - Script 7
• set commands
  • used, to debug scripts / Using set to debug scripts, Chapter 9 - Script 5 and Script 6, Chapter 9 - Script 7, Chapter 9 - Script 8, Chapter 9 - Script 9
• shell scripting
  • about / Getting started
  • text editor, using / Using a good text editor
• sleep command / The sleep command, Chapter 3 - Script 10, Chapter 3 - Script 11
• ssh / ssh and scp
• ssh prompt / ssh prompt
• subroutines / Subroutines, Chapter 4 - Script 4
• syntax errors / Syntax errors, Chapter 9 - Script 1, Chapter 9 - Script 2, More syntax errors, Chapter 9 - Script 3

T

• tasks
  • automating, with scripts / Chapter 6 - Script 1, Chapter 6 - Script 2, Chapter 6 - Script 3
• text editor
  • finding / Find and use a good text editor
  • using / Find and use a good text editor

U

• Uniform Resource Locator (URL) / wget options
• user
  • alerting / Alerting the user

V

• variables
  • using, in scripts / Using variables in scripts, Chapter 2 - Script 1

W

• wget configuration files / wget configuration files, Chapter 8 - Script 1
• wget options / wget options, wget options
• wget program / Introducing the wget program, wget and recursion
• wget return codes / wget return codes
• who command / Chapter 6 - Script 4

Z

• zip command
  • used, for backing up files / Cron, Chapter 6 - Script 5