A summary of common wildcard characters under Linux

wildcard characters are typically used for the user's command-line Bash environment, while Linux regular expressions are used in Grep/sed/awk scenarios.

* --wildcard characters (0 to more )

? --wildcard character, representing any 1 characters

; --delimiter for successive different commands

# --Configuration file Comments

| --Pipe character

~ User's home directory

- Previous directory

$ Required symbol before the $ variable

/ Path separator symbol

> or 1> redirects, overwriting the source file

>> direction, append

< input redirection

<< Append input redirection

' single quotation mark, no variable substitution function, the output is WYSIWYG

" double quotes, with variable substitution function, after parsing the variable output

the middle of {} is a command block combination or a content sequence

! "Non" ( not ) in logical Operation

&& The current command executes successfully, after executing an instruction

|| the current execution of an instruction fails to execute after the execution of an instruction

.. Top level directory

. current directory

Instance

1. ~ User's Home directory
   

   
   

   [[Email protected] ~]# CD ~lxh #cd ~user can switch to user's home directory [[email protected] lxh]# Pwd/home/lxh

A summary of common wildcard characters under Linux