Tasha Tasha - 1 month ago 12
Linux Question

Execution of ls command in Linux

I don't understand the execution when

??
and
*
are used together.

The following files are in the current working directory:


abc.txt

abcd.txt

bcd.txt

amm.doc

ammc.txt


What is the return result after executing command
ls a??.*

Answer
 * Matches any string, including the null string (empty string)
 ? Matches any single character

For exemples

 Pattern a??.* matches abc.txt  

- (a,a)
- (?,b)
- (?,c)
- (.,.)
- (*,txt)

 Pattern a??.* don't matches abcd.txt

- (a,a)
- (?,b)
- (?,c)
- but . dont' matches with d

Pattern a??.* don't matches bcd.txt because a don't matches with b.