O

-O option, mount command, Using the mount Command

-o option

mount command, Using the mount Command

share command

Non-File-System-Specific share Options

Setting Access Lists With the share Command

octal numbers escape character, UUCP /etc/uucp/Dialers File

open errors, NFS and, NFS Version 3 Protocol

OPEN share support, NFS version 4, OPEN Share Support in NFS Version 4

opening remote system connections

How to Open an ftp Connection to a Remote System

How to Open an ftp Connection to a Remote System

openssl command and sendmail, How to Set SMTP to Use TLS

operating systems

map variables, Variables in a Map Entry

supporting incompatible versions, How to Support Incompatible Client Operating System Versions

options (PPP)

asyncmap, Using /etc/ppp/options.ttyname on a Dial-in Server

auth, How to Add PAP Support to the PPP Configuration Files (Dial-in Server)

call

How to Call the Dial-in Server

/etc/ppp/peers/peer-name File

connect

How to Define the Connection With an Individual Peer

Invoking the Chat Script

crtscts, How to Define Communications Over the Serial Line

debug, How to Turn on PPP Debugging

guidelines for use, Using PPP Options in Files and on the Command Line

init

How to Configure a Machine on a Leased Line

Using /etc/ppp/options.ttyname on a Dial-in Server

local, How to Configure a Machine on a Leased Line

login

How to Add PAP Support to the PPP Configuration Files (Dial-in Server)

Using the login Option With /etc/ppp/pap-secrets

name, How to Add PAP Support to the PPP Configuration Files (Dial-out Machine)

noauth

How to Define the Connection With an Individual Peer

How to Configure a Machine on a Leased Line

noccp, How to Configure Users of the Dial-in Server

noipdefault, How to Define the Connection With an Individual Peer

noservice, Using PPPoE and PPP Files to Configure an Access Server

option privileges, Effects of Option Privileges

parsing by the pppd daemon, How PPP Options Are Processed

passive, How to Configure a Machine on a Leased Line

persist, How to Configure a Machine on a Leased Line

sync, How to Configure a Machine on a Leased Line

xonxoff, How to Define Communications Over the Serial Line (Dial-in Server)

options file, in PPP, How to Define Communications Over the Serial Line

options in sendmail command

command-line options from version 8.12

submit.cf Configuration File From Version 8.12 of sendmail

Additional or Deprecated Command-Line Options From Version 8.12 of sendmail

Additional Arguments for the PidFile and ProcessTitlePrefix Options From Version 8.12 of sendmail

command-line options in version 8.13, Additional Command-Line Options in Version 8.13 of sendmail

configuration file options in version 8.13, Additional and Revised Configuration File Options in Version 8.13 of sendmail

PidFile option, Additional Arguments for the PidFile and ProcessTitlePrefix Options From Version 8.12 of sendmail

ProcessTitlePrefix option, Additional Arguments for the PidFile and ProcessTitlePrefix Options From Version 8.12 of sendmail

options.ttyname file (PPP), See /etc/ppp/options.ttyname

OSNAME map variable, Variables in a Map Entry

OSREL map variable, Variables in a Map Entry

ostype directory, Contents of the /etc/mail/cf Directory

OSVERS map variable, Variables in a Map Entry

OTHER option of Permissions file, UUCP MACHINE Entry for OTHER

overlaying already mounted file system, Using the mount Command

owner- prefix, mail alias with, Mailbox Files

owner- prefix and mailbox names, Mailbox Files

owner-owner and mailbox names, Mailbox Files