| | D
- :d command (ex)
, , 
- d command (mailx)
, , 
- ~d command (mailx)
, 
- -d option
- lp command
, , ,  - lpstat command
, 
- dash (-)
- command option designator
,  - file type indicator
, 
- date command
, , 
- dd command (vi)
, , 
- dead.letter file
, , 
- defaults
- authorization protocol
,  - See also security
- command prompt
, ,  - directory
,  - file permissions
, ,  - permissions
,  - printer
,  - shell
, , ,  - vi mode
, 
- deletion
- of command line
,  - of directories
,  - of files
- description
, ,  - temporary work files
, 
- of mail
, ,  - of text
- ex command
, ,  - vi commands
, 
- of typing mistakes
, 
- devices
, 
- df command
, 
- diff3 command
, 
- diff command
, , 
- directories
, ,  - changing
, , ,  - changing permissions
, , , ,  - copying
, ,  - copying remotely
,  - creation
,  - current directory (.)
,  - default
,  - defined
,  - deletion
,  - determining current location
, ,  - as files
,  - display of directory disk usage
,  - display of permissions
, ,  - display of remotely
,  - display of status
, ,  - environment variables for
, , , ,  - folder
, ,  - hierarchy of
,  - home directory
- changing to
, , ,  - defined
,  - defining absolute path to
,  - remote login and
, 
- listing
,  - moving
,  - overview
,  - parent directory (..)
, , ,  - path names
, ,  - defined
, ,  - environment variables for
, , , , 
- permissions
,  - absolute
, ,  - changing
, , , ,  - default setting
, ,  - defaults described
,  - described
,  - displaying
, , 
- print working (pwd)
, ,  - renaming
,  - root directory (/)
,  - searching
- See searching, files and directories
- status, displaying
, ,  - subdirectories
,  - working
, , 
- disabling Compose Key
, , 
- disk storage, managing
, 
- display
- of Command Tool window
,  - of directories remotely
,  - of directory disk usage
,  - of directory permissions
, ,  - of directory status
, ,  - of disk usage
,  - of environment variables
,  - of file contents
,  - of file permissions
, ,  - of file status
, ,  - of file type
,  - of history list
, ,  - interruption of
,  - of mail headers
, ,  - of manual pages
,  - of network user information
, ,  - of permissions
, ,  - of printer status
, ,  - of property window, keyboard equivalent
,  - of remote login location
,  - of remote user information
, ,  - of Shell Tool window
,  - of users on your file server
, 
- DISPLAY environment variable
, , , 
- ditroff program
, 
- documents, defined
, 
- dollar sign ($)
- command prompt
, ,  - end-of-file designator (ex)
,  - end-of-line command (vi)
, ,  - escaping
, ,  - grep command operator
, ,  - metacharacter
, 
- dot (.)
- ~. command (mailx)
,  - current directory
,  - current line designator (ex)
,  - escaping
,  - file prefix
,  - grep command operator
, ,  - listing hidden (dot) files
,  - metacharacter
,  - search wildcard character (vi)
,  - searching for
, 
- dot-dot (..), parent directory
, , , 
- dot files
, 
- double quotes
- grep command and
, 
- double quotes, grep command and
, , 
- down one line, moving (vi)
, 
- du command
, 
- dumb terminals
, 
- duplicating
- See copy
- dw command (vi)
, 
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