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Old 05-16-2004, 02:18 AM   #1
jonathanztaub
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grep usage with regular expression


I've got a directory filled with log files.
I need to find the log files which part of their name is a date.
The date format is YYYY-DD-MM, such as:
2004-16-05

I know I have to execute:

ls | grep <regular_expression>

I tried a little with regular expression:

*\d*-\d*-\d*

but it didn't work.

Can somebody help me with this regular expression?
Does grep's regular expression is different from what I tried?
 
Old 05-16-2004, 02:36 AM   #2
Berhanie
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ls | egrep [0-9]{4}-[0-9]{2}-[0-9]{2}
the egrep would match exactly what you wanted, xxxx-xx-xx, where each of the "x"s is a possibly distinct digit
 
Old 05-16-2004, 02:41 AM   #3
bulliver
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Well, if we assume that the year in the filename is always 2003, or 2004 then just use this:
Code:
 ls *{2003,2004}*
You may get a few false positives but it's easier than writing some cryptic regex...
If the files include other years just add them to the list.
 
Old 09-01-2004, 09:19 PM   #4
subaruwrx
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Quote:
Originally posted by bulliver
Well, if we assume that the year in the filename is always 2003, or 2004 then just use this:
Code:
 ls *{2003,2004}*
You may get a few false positives but it's easier than writing some cryptic regex...
If the files include other years just add them to the list.
How not use

Code:
ls *{2003|2004}*
Is it the same?
 
Old 09-01-2004, 09:54 PM   #5
Tinkster
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No, it's not {,} is shell syntax, {|} is regex.

ls != grep

Can't mix those, the shell will give you an
error on the latter.



Cheers,
Tink
 
Old 09-01-2004, 10:01 PM   #6
subaruwrx
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Quote:
Originally posted by Tinkster
No, it's not {,} is shell syntax, {|} is regex.

ls != grep

Can't mix those, the shell will give you an
error on the latter.



Cheers,
Tink
You mean both of them are for "different application"? But their meaning is still the same?
 
Old 09-01-2004, 10:21 PM   #7
Tinkster
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Indeed ...


btw, it would be nice if you didn't
dig up long dead threads to attach your queries
to them but instead either a) use the info you
found in them or b) ask a specific question in
a thread of your own.

This one here, and that one:
http://www.linuxquestions.org/questi...threadid=74014

Cheers,
Tink
 
Old 09-01-2004, 10:35 PM   #8
subaruwrx
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Quote:
Originally posted by Tinkster
Indeed ...


btw, it would be nice if you didn't
dig up long dead threads to attach your queries
to them but instead either a) use the info you
found in them or b) ask a specific question in
a thread of your own.

This one here, and that one:
http://www.linuxquestions.org/questi...threadid=74014

Cheers,
Tink
Oh sorry about that.

Will take note.
 
  


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