How to list the files in a directory ignoring the cases of filenames

[CA1490051]

Hi All,

I want to list down all the files ina directory but by ignoring the case (Capital or Small letters) of the filename.

Ex - if 2 files are there
Makefile
makefile
Make2

i want to give some thing like
ls | grep -i "M*"
to list down all the files starting with "M".

Can any one Please help me to acieve the same.

thanks and advance
Vikram

[Steven E. Protter]

Shalom Vikram,

find . -type f

Ignores directories and such.

man find

SEP

[Sandman! · Accepted solution]

I am not sure I understand your question but let me try. It would help immensely if you could provide a concrete sample of the input and the desired output.

# ls [mM]*

~hope it helps

[Dennis Handly]

>I want to list all the files in a directory but by ignoring the case of the filename.
>Ex - if 2 files are there: Makefile makefile Make2
>i want to give something like: ls | grep -i "M*"
>to list down all the files starting with "M".

To list all files starting with "M" you can use:
$ ls [Mm]*

You could use grep too:
$ ls | grep -i "^M"

[Sanjiv Sharma_1]

I think the following will meet your requirement.

$ ls [mM]*

[CA1490051]

Hi All,

Thnk you very much for the answers
ls | grep '[mM]*\.txt'
is working for me

but one problem is if i have files as below
ABCDxxxxMakefile.txt
ABCDyyymakefile.txt

if i give
ls | grep '^ABCD*[mM]*\.txt'

it is not listing the above files.

Please correct the errors in my regular expressions.
Basically the * (Ex- ls | grep '*[mM]*')at the beginning of the string is not working.


thanks and regards
Vikram

[James R. Ferguson]

Hi Vikram:

You need:

# ls | grep '^ABCD.*[mM]*\.txt'

...to list the files. The dot (".") specifies any character and the asterisk ("*") following says zero or more of the any character.

Regards!

...JRF...

[spex]

$ ls | grep '^ABCD.*[mM].*\.txt'

[Peter Nikitka]

Hi,

what about
ls -d *[mM]*

mfG Peter

[Dennis Handly]

>Please correct the errors in my regular expressions.
>Basically the * (Ex- ls | grep '*[mM]*') at the beginning of the string is not working.

As JRF and spex said, you need to use ".*" for "*", "." for "?". You also may need to anchor your RE at the beginning with "^" or end with "$".
Note: you don't need the ".*" at the end or beginning of your RE if it isn't anchored.

The former is a regular expression. The latter is a Pattern Matching Notation.
See regexp(5).

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