| | D
- D escape character
- Devices file
,  - Dialers file
, 
- d escape character
- Dialers file
,  - Systems file chat script
, 
- -d option
- cu command
,  - showmount command
, 
- D. UUCP data files
- cleanup
, 
- DA (SLP)
- advertising
,  - discovery
, 
- DA_BUSY_NOW
, 
- DA discovery (SLP)
, 
- DA heartbeat
- frequency
, 
- daemon running already message
, 
- DaemonPortOptions option
- sendmail command
, , 
- daemons
- automountd
- autofs and
,  - overview
, , 
- lockd
,  - mountd
- checking response on server
,  - description
,  - enabling without rebooting
,  - not registered with rpcbind
,  - remote mounting requirement
,  - verifying if running
, , 
- nfsd
- checking response on server
,  - description
,  - enabling without rebooting
,  - remote mounting requirement
,  - syntax
,  - verifying if running
, 
- nfslogd
,  - required for remote mounting
,  - rpcbind
- dead or hung
,  - mountd daemon not registered
, 
- statd
, 
- DAs (SLP)
, , , ,  - advertising
, , , ,  - deploying
, ,  - dial-up networks discovery
, ,  - discovery
, , , , ,  - eliminating multicast
,  - heartbeat
, , ,  - multicast
,  - removing
, 
- dash (-)
- dial-code abbreviation
,  - in autofs map names
,  - Line2 field placeholder
,  - Speed field placeholder
, 
- data (D.) UUCP files
- cleanup
, 
- DataFileBufferSize option
- sendmail command
, 
- date
- synchronizing with another system
, 
- day entries for Time field
, 
- ddd escape character
- Systems file chat script
, 
- deactivating extended accounting
, 
- DeadLetterDrop option
- sendmail command
, 
- debug option for PPP
, 
- debugging
- UUCP transmissions
, , 
- debugging PPP
- debugging chat scripts
,  - diagnosing configuration problems
,  - diagnosing network problems
,  - diagnosing PPPoE problems
,  - diagnosing serial line problems
,  - fixing communications problems
,  - fixing modem problems
,  - turning on debugging
, 
- default file-system type
, 
- default keyword of User-job-grade field
, 
- default project
, 
- defaultdir parameter
- /etc/default/nfslog.conf file
, 
- defaultroute option (PPP)
, , 
- delay_checks FEATURE() declaration
, 
- delay escape character
, , 
- DelayLA option
- sendmail command
, 
- deleting
- .rhosts files
, 
- DeliverByMin option
- sendmail command
, 
- delivery agent flags
- sendmail command
, 
- demand initialization script for PPP
, 
- desktop-publishing files
- mailbox space requirements and
, 
- Devconfig file
- description
, ,  - format
, 
- DEVICE FAILED message
, 
- DEVICE LOCKED message
, 
- device transmission protocols
, , 
- device type for UUCP communication link
, 
- Devices file
- Class field
,  - description
, , ,  - Dialer-Token-Pairs field
, ,  - format
,  - Line2 field
,  - Line field
,  - multiple or different files
,  - protocol definitions
, ,  - Systems file Speed field and
,  - Systems file Type field and
,  - Type field
, , 
- dfstab file
- automatic file-system sharing
,  - disabling mount access for one client
,  - enabling NFS server logging
,  - enabling secure NFS
,  - enabling WebNFS service
,  - secure NFS option
,  - syntax for NFS file systems
, 
- DH authentication
- dfstab file option
,  - overview
, ,  - password protection
,  - secure NFS and
,  - user authentication
, 
- diagnostics for PPP
, ,  - leased-line link
,  - log file for a PPPoE tunnel
,  - turning on, with pppd
, 
- dial-code abbreviations
, , 
- DIAL FAILED message
, 
- dial-in server
- configuring
- CHAP authentication
, ,  - modem
,  - PAP authentication
, , , ,  - serial line communications
, ,  - serial port
, 
- creating accounts for PPP users
, , ,  - definition
,  - planning information
, ,  - receiving calls
,  - task map for configuring
,  - UUCP
, 
- dial-out machine
- addressing
- dynamic
,  - static
, 
- calling the remote peer
,  - configuring
- CHAP authentication
, ,  - connection with a peer
,  - modem
,  - PAP authentication
,  - serial line communications
,  - serial port
, 
- configuring a serial line with /etc/ppp/options.ttyname
,  - creating a chat script
,  - definition
,  - planning information
,  - task map for configuring
,  - using .ppprc in the $HOME directory
, 
- dial-up link
,  - authentication for the link
,  - creating chat scripts
, , , , , , , ,  - definition
,  - diagnosing common problems
, , , , , , , ,  - dial-up process
,  - example
,  - initiating a call to a peer
,  - modem settings, basic
,  - parts of the link
,  - planning
, , ,  - task map
,  - templates for configuration files
, 
- dialback
- CALLBACK option of Permissions file
, ,  - enabling through chat script
, 
- Dialcodes file
,  - description
, 
- Dialer-Token-Pairs field of Devices file
, , , , , , , , , , 
- Dialers file
, ,  - code example
,  - description
, , ,  - Devices file DTP field and
, 
- Digital Subscriber Line Access Multiplexer (DSLAM), for PPPoE
, 
- dir must start with '/' message
, 
- direct I/O mounting option
, 
- direct keyword of DTP field
, 
- Direct keyword of Type field
, 
- direct link UUCP configuration
, 
- direct maps (autofs)
- comments in
,  - description
,  - example
,  - modifying
,  - overview
,  - syntax
,  - when to run automount command
, 
- direct remote logins
- indirect logins or
- rlogin command
, , 
- using rlogin command
, , 
- directories (UUCP)
- administration
,  - error messages
,  - public directory maintenance
, 
- directory agent (SLP)
, , , , , , 
- DirectSubmissionModifiers option
- sendmail command
, 
- disabling
- autofs browsability
- overview
,  - tasks
, 
- .forward files
,  - large file creation
,  - mount access for one client
,  - NCA
,  - NCA logging
, 
- discovery requests (SLP)
, 
- diskless clients
- manual mounting requirements
,  - security during boot process
, 
- displaying extended accounting status
, 
- displaying network information
, , , , 
- DNS name service
- sendmail program and
, 
- dnsbl FEATURE() declaration
, , 
- domain directory
, 
- domain names
- Secure NFS system and
, 
- domains
- definition
,  - remote logins and
,  - subdomains and
, 
- DontBlameSendmail option
- sendmail command
, 
- DOS files
- accessing with autofs
, 
- dot (.)
- in domain addresses
,  - in mailbox names
,  - rcp command syntax
, , 
- DoubleBounceAddress option
- sendmail command
, 
- drift file
, 
- dropped packets
, 
- DSL
- See PPPoE
- DSL modem
, 
- dtmail mail user agent
, 
- dynamic addressing
- PPP
, 
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