display a file named aab

windbadboy · 01-05-2013, 03:26 AM

I created a file named 'aab',and execute the following order:
[root@cu home]# ls a\{2\}b
ls: a{2}b: No such file or directory

I want the result is to display the aab file,but it doesn't work,how to get the result what I want.

EricTRA · 01-05-2013, 03:29 AM

Hi,

How about

Code:

ls aab

Or do you refer to something else, for example the contents of the file? That would be one of the following

Code:

cat aab
less aab
more aab

Not quite sure why you add the { } to the file name if you didn't include them in it when creating the file.

Kind regards,

Eric

windbadboy · 01-05-2013, 04:01 AM

thanks in advance.
I know your way is ok,but I want to display it with RE.

EricTRA · 01-05-2013, 04:18 AM

Hi,

Do you mean something like this for example:

Code:

ls [a]*b

which would find all files beginning with any number of character 'a' followed by b? Remember that it's not 'ls' that's doing the globbing but bash.

Kind regards,

Eric

whizje · 01-05-2013, 08:11 AM

Bash only supports globbing and if you enable it extended globbing, If you want to use RE you have to use find.

EricTRA · 01-05-2013, 08:14 AM

Quote:

Originally Posted by whizje

Bash only supports globbing and if you enable it extended globbing, If you want to use RE you have to use find.

Hi,

Or use 'ls' and pipe the output to a program that can use regular expressions, for example grep. Just mentioning but find is a lot more powerful, I agree.

Kind regards,

Eric

ntubski · 01-05-2013, 10:44 AM

Quote:

Originally Posted by windbadboy

I know your way is ok,but I want to display it with RE.

Maybe you should ask about what you really want to do.

colucix · 01-05-2013, 04:33 PM

You may also consider the extglob shell option:

Code:

$ touch aab aaab aaaab
$ ls @(a)@(a)b
bash: syntax error near unexpected token `('
$ shopt -s extglob
$ ls @(a)@(a)b
aab
$ ls @(a)@(a)@(a)b
aaab
$ ls *@(a)@(a)b
aaaab  aaab  aab
$

See

Code:

man -P "less -p extglob" bash

or http://www.gnu.org/software/bash/man...ttern-Matching for details.