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grep problem

 
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# 1  
Old 06-22-2005
grep problem
I know that grep will display the matched line, but how about if I want to get the matched characted, for example:

file.txt contains:
Hello 123 World
This is a56 letter34
56are you su345re ?
1000 yes I do

I want to list all instances of digits that appear e.g:
123
56
34
56
345
1000

do I have to use sed ?

Thanks !
# 2  
Old 06-22-2005
Hello,

you can use

grep [0-9] filename

but without sed.... it doesnt work...

regards
# 3  
Old 06-22-2005
i believe this wont work

above reply would extract the entire line if matched

and the question was to retrieve only the numeric instances from the file
# 4  
Old 06-22-2005
For grep.

Code:
grep -o '[0-9][0-9]*' filename

Vino
Last edited by vino; 06-22-2005 at 05:19 AM..
# 5  
Old 06-22-2005
Thanks Vino
Thanks Smilie
 
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