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r command 2nd
rand function
random number generator
ranges
     awk
     lines and sed
     patterns
     range operators
rcp utility
read command
    Bash
         file descriptors
         user input
     Bourne shell
    Korn shell
         file descriptors
         user input
     streams 2nd
     while loop
readers
reading
     input
     sed
     user input 2nd 3rd 4th
records
     awk
     multiline
    separator
         awk
redirection 2nd
     awk
     Bash
     Bourne shell
     C shell
     child shell
    exec command
         Bash
         Bourne shell
         Korn shell
    I/O redirection
         Bash
         Bourne shell
         Korn shell
     input
     Korn shell
    operators
         Bourne shell
         C shell
         Korn shell
     output
     output and error
     when set up
regular expressions 2nd 3rd [See also metacharacters, pattern matching]
     awk 2nd
     basic GNU grep
     case sensitivity
     defined
     egrep examples 2nd
     example 2nd 3rd
     extended GNU grep
     GNU basic grep 2nd
     GNU extended egrep 2nd
     GNU grep
     GNU grep metacharacters
     grep
         command 2nd
         examples
     matching on an entire line
     metacharacters
     POSIX
     sed
rehash command
relational operators
     awk 2nd 3rd
     Bash
     Bourne shell
     common errors
     Korn shell
repeat command
     C shell 2nd
reports
     awk 2nd
resetting
    signals
         Bash
         Bourne shell
         Korn shell
restricted scripts
     Korn shell
return function
     Bash
return values
     function arguments and
     function arguments, Bash
     local variables
rgrep
     defined
     example
     features
     how it works
rgrep utility
rlogin utility
rm utility
rmail utility
rmdir utility
roles
     su command
     superuser
root
     running scripts as
     scripts that run as
     UID
rsh utility
run level
runtime errors, debugging
ruptime utility
rusers command
rw-rw-rw- permissions
rwho utility
rwxrwxrwx permissions

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