Shulou(Shulou.com)06/01 Report--

This article is to share with you what linux shell escape characters are, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

\ t

A tab that represents a horizontal

\ v

Represents a vertical tab

\ b

Indicates a backwards character

\ a

Means "warning" (buzzing or flashing)

\ 0xx

Translated into the characters represented by the ASCII code as octal 0xx

\ "

Indicates the literal meaning of quotation marks (")

1 echo "Hello" # Hello 2 echo "\" Hello\ ", he said." # "Hello", he said.

\ $

Represents the literal meaning of the dollar sign ($) (if the variable name is followed by\ $, the value of the variable will not be referenced)

1 echo "\ $variable01" # output is $variable01

\\

Indicates the literal meaning of the backslash (\)

1 echo "\" # output is\ 2 3 # however. . . 4 5 echo "\" # on the command line, this sentence will print the value of the SP2 variable and ask you to continue typing.. 6 # in the script file, this sentence will make an error.

The role of a backslash depends on whether it is self-escaping, referenced, or present in a command substitution structure or in a here document.

1 # simple escape and reference 2 echo\ z # z 3 echo\\ z #\ z 4 echo'\ z` #\ z 5 echo'\ z' #\ z 6 echo "\ z" # 7 echo "\\ z" #\ z 8 9 # command replace 10 echo `echo\ z` # z 11 echo `echo\\ z` # z 12 echo `echo\\ z` #\ z 13 echo `echo\\ z` #\ z 14 Echo `echo\ z` #\ z 15 echo `echo\ z` #\ z 16 echo `echo "\ z" `#\ z 17 echo `echo "\\ z"` #\ z 18 19 # Here document 20 cat

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