Escape SequenceDescriptionbBackspace characterfForm feed characternNewline characterrCarriage returntTab charactervVertical (Zeus web server)
Escape SequenceDescriptionbBackspace characterfForm feed characternNewline characterrCarriage returntTab charactervVertical tab characteroooThe single character with octal value oooThe conversion specifier is quite complex, so we ll list only the common usage here. More details can befound in the bash online manual or in the printfpages from section 3 of the online manual (man 3printf). The conversion specifier consists of a %character, followed by a conversion character. The prin- cipal conversions are as follows: Conversion SpecifierDescriptiondOutput a decimal number. cOutput a character. sOutput a string. %Output the %character. The format string is then used to interpret the remaining parameters and output the result. For example, $ printf %sn hellohello$ printf %s %dt%s Hi There 15 peopleHi There 15 peopleNotice how we must use to protect the Hi Therestring and make it a single parameter. returnThe returncommand causes functions to return. We mentioned this when we looked at functions ear- lier. returntakes a single numeric parameter that is available to the script calling the function. If noparameter is specified, returndefaults to the exit code of the last command. setThe setcommand sets the parameter variables for the shell. It can be a useful way of using fields incommands that output space-separated values. 58Chapter
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