Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] configuring firewall settings for forwarding for existing user accounts Pine program piping output to sending from command line spam e-mail servers configuring Postfix forwarding e-mail for existing user accounts providing remote access to IMAP and POP servers sending mail to IP addresses echo command 2nd edit mode ( vi editor) 2nd editing [See also emacs editor; vi editor] adding text ( vi ) changing text ( vi ) cheat sheets ( vi ) command mode (vi) 2nd commands for editing files commands for text editing ( vi ) copy-and-paste function (vi) cursor movement (vi) deleting text (vi) edit mode (vi) 2nd emacs for 2nd 3rd 4th files from command line navigation (vi) repeating last command (vi) saving (vi) search-and-replace (vi) text from command line undoing changes (vi) vim and vi word wrap (vi) egrep command about creating atom with finding lines where one character varies options for regular expressions with rules and tools for building atoms testing regular expressions using wildcard character with 2nd elif (else if) statements emacs editor about 2nd starting using enabling ACLs SSH server software encryption encrypted passwords in Mac OS X encrypted transactions with scp password env command environment variables [See also PATH environment variable] $USER common making durable changes in setting setting FTP_PASSIVE to true using in shell scripts viewing error messages interpreting watching system-startup Esc key escaping characters escape sequences for bash using backslash for 2nd 3rd 4th 5th ettercap 2nd ex editor execute permissions about cautions with for files and directories expr command expressions shell script test test using in scripts extended attributes eXtensible Markup Language. [See XML] extracting output from data |