Beginning Unix

Index

SYMBOLS

+ (addition operator), 236

[a-z] (alphabet inside brackets), 153

<> (angle brackets), 113, 310

* (asterisk), 111, 151

@ (at sign), 360

\ (backslash), 146, 153

\> (backslash, greater than sign), 146

\< (backslash, less than sign), 146

{} (braces), 173

^ [] (caret before bracketed sequence), 152

:! (colon, exclamation point), 143

{} (curly bracket notation), 258–259

/ (division operator), 236

$ (dollar sign), 152–153, 306

.. (double dot), 86

“ (double quotes), 310

= (equal sign), 360

/ (forward slash), 54, 55–56

> (greater than sign), 244–245

# (hashmark character), 227–228, 306

- (hyphen), 69

< (less than sign), 244–245

* (multiplication operator), 236

[0-9] (numbers inside brackets), 154

. (period or dot), 62, 86, 150, 310

+= (plus, equal sign), 360

? (question mark), 111, 153

?= (question mark, equal sign), 360

#! (shebang), 182–183, 230

[] (square brackets), 111, 150

[^] (square brackets with caret between), 151

- (subtraction operator), 236

∼ (tilde), 86, 127

| (vertical line character), 114, 245

A

absolute path, 56, 85–86

access control

commands, scheduling (crontab), 208

group accounts, 30

one-time scheduling execution (at command), 211

services, 223–224

user accounts, 30

accidental deletion, recovering from (restore command), 338–340

accounts

commands, listed, 40–41

group, 30, 38

managing (useradd command), 41–43

removing unneeded, 221–222

root, 29

system, 30

user, 30

acknowledgment number, 284

action, 270

addition operator (+), 236

address

absolute and relative ...