Linux wildcard characters

通配符

Attention:
The 1.linux wildcard is different from The Three Musketeers (grep, SED, awk) Regular expressions, therefore, the meaning of the representative is also a big difference
2. Wildcard characters are typically user command-line bash environments, while Linux regular expressions are used for grep, SED, awk

wildcard characters	Description	Degree of importance
*	wildcards, which represent arbitrary (unlimited number of characters) characters	☆☆☆☆☆
?	wildcards, which represent any one character	☆
#	Configuration file comments	☆☆☆☆☆
	Pipeline	☆☆☆☆☆
~	User's home directory	☆☆☆☆☆
-	The last directory in which you were located	☆☆☆☆☆
$	The symbol to be added before the variable	☆
/	Path separator symbol, also the root directory meaning	☆
> or 1>	Redirect, overwrite old data	☆☆☆☆☆
>>	Append redirect, append content file trailer	☆☆☆☆☆
<	Input redirection (Xargs, TR)	☆☆☆☆☆
<<	Append input redirection (CAT)	☆
‘	Single quotes, no variable substitution function, the output is WYSIWYG	☆☆☆☆☆
"	Double quotes, with variable displacement function, after parsing the variable output, without quotation marks equivalent to double quotes, commonly used double quotes	☆☆☆☆☆
·	Anti-quotes, two anti-quotes • •, middle for command, will execute first, equivalent to $ ()	☆
{}	The middle is the command block combination or the content sequence	☆☆☆☆☆
!	"Non" (not) in logical operation	☆
&&	And and, after the current one instruction executes successfully, the next instruction is executed	☆
	or the latter, executing the next instruction after the current one instruction fails	☆
.	Point represents the current directory	☆☆☆☆☆
..	Two points represent the previous level of the directory	☆☆☆☆☆

Case one:

Linux wildcard characters