Scripting

3.10    Strings

Strings are the central data type of Bash—I already mentioned that several times. Nevertheless, the handling of strings sometimes seems strange. This section summarizes the most important functions with regard to strings.

3.10.1    Single versus Double Quotation Marks

In Bash, strings can be placed in both single and double quotation marks:

• 'abc$efg': In this case, the string will be transferred exactly.

• "abc$efg": In this variant, Bash replaces variables contained in the text ($efg in this case) with its contents and may also perform other substitution procedures, which I will explain later in this section.

In Bash, multiple strings can be concatenated without an operator. The only requirement is that Bash can recognize ...