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## Index: D

dash (-) for command options: 1.2. Syntax of Unix Command Lines
date and time
  date program and: 1.1.6.1. date
    5.1.1.2. The > operator
  process execution time: 7.2.1. ps
DEL, DELETE keys: 1.1.8. Correcting a Command Line
deleting files and directories: 4.4.5. Removing Files and Directories
desktop environments: 2.1. Introduction to Windowing
desktops (virtual): 2.6.2. Pagers and Virtual Desktops
dir command (FTP): 6.4.2.1. Command-line ftp
directly executable programs: 7.2.1. ps
directories: 3.1. The Unix Filesystem
  .. shortcuts: 3.1.5.2. Relative pathnames up
    3.1.8. Listing Files with ls
    4.4.2.1. cp
  changing: 3.1.6. Changing Your Working Directory
  creating: 4.4.1. Creating Directories with mkdir
  current: 3.1.2. Your Working Directory
  deleting: 4.4.5. Removing Files and Directories
  files, completing: 3.5. Completing File and Directory Names
  hierarchy of trees: 3.1.3. The Directory Tree
    3.1.7. Files in the Directory Tree
  home: 3.1.1. Your Home Directory
  listing: 3.1.8. Listing Files with ls
  names of: 4.1. File and Directory Names
  pathnames: 3.1.3. The Directory Tree
  permissions: 3.1.8. Listing Files with ls
    3.3.1. Directory Access Permissions
    umask command and: 3.7. Customizing Your Account
  working: 3.1.2. Your Working Directory
DISPLAY environment variable: 2.3.3.2. Problem checklist
display managers: 2.2.1. A. Ready to Run X (with a Graphical Login)
documentation on Unix: 8.1. Documentation
dollar sign ($), as shell prompt: 1.1.2. Logging in Nongraphically
  1.1.5. The Shell Prompt
  2.2.3. C. Starting the Window Manager
dot (.)
  directory shortcuts: 3.1.5.2. Relative pathnames up
    3.1.8. Listing Files with ls
    4.4.2.1. cp
  in filenames: 4.1. File and Directory Names

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