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d command 2nd
daemons
DARPA and the Internet
dash metacharacter
date utility
dates
     date command
     POSIX bracketed character class
dd utility
debugging
     aliases, sneaky
     Bash error messages
     Bash invocation options
     Bourne shell error messages
     branching
     case command
     comments
     conditional constructs
     debugger signal
     error messages
     error types
     exit status
     file testing
     here document
     incomplete statements
     Korn shell error messages
     logical operator errors
     loops
     metacharacters
     naming convention issues
     operator error
     operators, missing
     paths
     permissions
     quotes
     relational operator errors
     robustness, lacking
     runtime errors
    scripts
         Bash
         Bourne shell
         C shell
         Korn shell
     shbang line
     shell scripts 2nd
         Bash
         Bourne shell
         C shell
         Korn shell
         TC shell
     style issues
     syntax errors
     variables 2nd
decimal permission modes
decimal places and integer functions
declare
     -a command
     -i command
     function
declare command
     Bash 2nd
decrement operators
delete command
descriptors [See file descriptors]
df command
df utility
diff utility
dir command
directories
     cd command
     changing ownership
     changing permissions
    completion
         Bash 2nd
         C shell
         Korn shell 2nd
    expansion
         Bash 2nd
         C shell
         Korn shell 2nd
     home directory
     ls utility
     mkdir utility
     pwd utility
     rm utility
     rmdir utility
directory stack
    manipulating
         Bash
         C shell
    variables
         C shell
dirs command
disk
     free space
     usage
division by zero signal
dollar sign metacharacter
     GNU egrep
     GNU grep
     grep
     sed
dollar sign prompt
     Bash
     Bourne shell
     Korn shell
done keyword
DOS utilities
dos utility
dosdebug utility
dosexec utility
dot command
     Bash 2nd 3rd
     Bourne shell 2nd
     Korn shell
dot metacharacter
     GNU egrep
     GNU grep 2nd
     grep
     sed
double quotes
     Bourne shell
     C shell
     combining with single quotes
     debugging
     Korn shell
     metacharacters
du utility

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