expansion quotes

Single quotation marksPurpose: In order to protect the text from being converted. That is, except for the single quote, all the text inside the single quotation marks is output as is.1. [[email protected] sp49ep9]# echo ' $*>$*>2. [[email protected]

Character expansion*This "*" character means matching any character in the file nameThe shell expands "*" into something else, before the echo command is executed.~ Home DirectoryArithmetic expression expansionAn arithmetic expression expands using

Linux Shell Parameter extension (Parameter Expansion), parameterexpansion The main reference: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02 Other materials:

This article main reference: HTTP://PUBS.OPENGROUP.ORG/ONLINEPUBS/9699919799/UTILITIES/V3_CHAP02.HTML#TAG_18_06_02Other information:http://www.ibm.com/developerworks/cn/linux/l-bash-parameters.htmlThe parameter extension is represented as:

The main reference in this paper: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02Other information:http://www.ibm.com/developerworks/cn/linux/l-bash-parameters.htmlThe parameter extension is represented by:

Today, a friend asked, the next difference, by the way review. Single quotes differ from double quotes: The fields inside the double quotes are interpreted by the compiler and then exported as HTML code. ' Single quotes inside without

There has been some confusion about single and double quotes, and this section discusses the issue of single and double quotation marks.First, the basic knowledge1. Single quotation marks in C language are used to denote character literals2. Double

In this chapter we is going to look at some of the ' magic ' that occurs on the command line when you press the Enter KEY.W Hile we'll examine several interesting and complex features of the shell,we would do it with just one new command:

Ix. unfoldingThe expansion of the command line is done after splitting the word into words. There are seven types of expansion: curly brace expansion, wavy line expansion, parametric and variable expansion, command substitution, arithmetic expansion,

Create user MCC identified by manager; Note here that the password should not be extended with single quotes. Drop  user  mcc  cascade; Direct Delete user Create user MCC identified by manager D Efault tablespace mcc01 temporary