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2025-04-06 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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This article will explain in detail what are the special characters in the shell, Xiaobian thinks it is quite practical, so share it with you as a reference, I hope you can gain something after reading this article.
#
Notes. The line begins with #(#! An exception) begins with a comment.
;
Command delimiter [semicolon, ie;]. You can write two or more commands on the same line.
;;
Terminate case option [double semicolon, ie;;].
.
Point command [period, i.e..]. Equivalent to source command
"
Partially quoted [double quotes, i.e."]. "STRING" will block (interpret) most special characters in STRING
'
Full quote [single quote, i.e.']. 'STRING' will prevent interpretation of all special characters in STRING. It's a stronger way of saying
strong form
,
Comma operator. The comma operator links a series of arithmetic operations. Although everything in it is run, only the last item is returned.
`
Command replacement. The command construct assigns the output of a command to a variable.
:
Empty command [colon, ie:]. Equivalent to NOP (no op, a command to do nothing). It can also be thought of as having the same effect as the shell's built-in true command. The ":" command is a bash built-in command with exit status "true"(0).
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