String in Bash

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  • special characters:

tab and new line: 

augixs-ibook-g4:~ augix$ s=$'\t\n'
augixs-ibook-g4:~ augix$ echo $s
 
augixs-ibook-g4:~ augix$ s='\t\n'
augixs-ibook-g4:~ augix$ echo $s
\t\n
  • concatenate two strings:

The braces are required for concatenation constructs. 

$p_01
The value of the variable "p_01".

${p}_01
The value of the variable "p" with "_01" pasted onto the end.
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