Symbols

• ! (exclamation point)
  • beginning shebang lines in bash, Creating the Test Output Files
  • ending names of macros, Getting Started with “Hello, world!”
  • not operator, Getting Started
• " " (quotation marks, double)
  • enclosing CLI arguments with spaces, How echo Works
  • enclosing raw string in regular expression, Validating the Delimiter
  • escaping delimiters, How cut Works, Parsing Delimited Text Files
  • file glob patterns enclosed in, How find Works
• #[test] attribute, Writing and Running Integration Tests, Using clap Derive
• $ (dollar sign)
  • end of string matching in regular expressions, Defining the Arguments, Using a Regular Expression to Match an Integer with an Optional Sign
  • ends of lines in cat -e, How tail Works, Writing the Program
• $? bash variable, Understanding Program Exit Values
• % (percent sign), indicating end of fortune record, Solution
• & operator, Opening a File or STDIN
  • binary AND, Displaying Octal Permissions
  • borrowing reference to a variable, Using the Result Type, Using the Test Suite
• && (logical and) operator, Exit Values Make Programs Composable, Solution
  • combining with || (logical or operator), Solution
• () (parentheses)
  • capturing in regular expressions, Solution for Parsing the Position List, Solution for Parsing the Position List
  • grouping and capturing in regular expressions, Using a Regular Expression to Match an Integer with an Optional Sign
  • grouping find utility arguments, How find Works
  • signifying unit type, Getting Started
• (.)\1 pattern, finding any character repeated twice, Defining ...