- Working with MS-DOS files
, Duplicating disks
- develop, Mass Rename/copy/link Tools
- device, Controlling the system , Mounting and Unmounting (Floppy/CDROM/Hard-drive Partitions) , Network Configuration , RPM: Redhat Package Management System
- devices, Working with files and folders , Controlling the system
- df, Finding information about the system , Finding information about partitions
- dictionary, Internet Specific Commands
- diff, Text Information Tools , Finding a particular tool(s)
- diff3, Text Information Tools , Finding a particular tool(s)
- difference, Concept Definitions , Text Information Tools , Text Conversion/Filter Tools , Network Commands
- differences, rsync
- different, Finding files , Managing users , Text Information Tools , Text Conversion/Filter Tools , Finding Text Within Files , Remote Administration Related , File Permissions , Wildcards
- diffutils, Finding a particular tool(s)
- dig, Internet Specific Commands
- digit, Text manipulation tools , Useful categories of characters (as defined by the POSIX standard)
- digits, Working with files and folders , Useful categories of characters (as defined by the POSIX standard)
- dir, Useful categories of characters (as defined by the POSIX standard)
- dir1, Finding information about the system
- dir2, Finding information about the system
- directories, Moving around the filesystem , Finding files , Working with files and folders , Remote Administration Related , File Permissions
- directory, General Shell Tips ,

