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i command 2nd
id utility
if command
     Bash
     Bourne shell
     debugging
     Korn shell
if constructs 2nd 3rd
     Bashl
     Bourne shell
     C shell
     Korn
     Korn shell
if statements, nested
if/elif/else command
     Bash
     Bourne shell
     Korn shell
if/else command
     Bash
     Bourne shell
     Korn shell
if/else construct 2nd 3rd 4th
if/else if statement
if/else/else if construct 2nd 3rd
if/endif constructs, debugging
illegal hardware instruction signal
incomplete statements, debugging
increment operators
indentation
     debugging
     if blocks
index function
inheritance and shells
init
     authentication
     boot scripts
     overview
initialization files
     for each shell
     system-wide
     user-specific
input 2nd 3rd [See also stdin] [See also pipes]
     Bash
     Bourne shell
     C shell, reading
     command line, parsing
    here document
         Bash
         Bourne shell
         C shell
         Korn shell
     Korn shell
     pipes, grep
     reading, nawk
     redirection
         awk 2nd
         Bash
         Bourne shell
         C shell
         Korn shell
         pipes
     sed
    standard
         Bash
         Korn shell
     user, reading 2nd 3rd 4th
input field separators
insert command
integers
    bases
         Bash
         Korn shell
     Bash
     functions, awk
     Korn shell
interactive stop signal
internal field separator
     Bash
     Bourne shell
     Korn shell
internationalization and POSIX
Internet and DARPA
interprocess communication
interrupt handling
invalid memory references signal
invitation example scripts
invocation arguments
     Bash
     Korn shell
invocation options, Bash

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