You have files: img01.png, img02.png, img10.png, img20.png. Which pattern matches only files with numbers from 01 to 09?

hard📝 Application Q15 of 15

Linux CLI - File and Directory Operations

You have files: img01.png, img02.png, img10.png, img20.png. Which pattern matches only files with numbers from 01 to 09?

A<code>img0[1-9].png</code>

B<code>img[0-9][1-9].png</code>

C<code>img??.png</code>

D<code>img[01-09].png</code>

Step-by-Step Solution

Solution:

Step 1: Understand pattern img0[1-9].png
This matches 'img0' plus one digit from 1 to 9, then '.png'. So it matches 'img01.png' to 'img09.png'.
Step 2: Check other patterns
img[0-9][1-9].png matches any two digits, including 'img10.png' and 'img20.png'. img??.png matches any two characters after 'img', so all files. img[01-09].png is invalid syntax because ranges like '01-09' are not valid inside [].
Final Answer:
img0[1-9].png -> Option A
Quick Check:
Use 0 then [1-9] for numbers 01-09 [OK]

Quick Trick: Use fixed digit then range in [] for number ranges [OK]

Common Mistakes:

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