Shell Programming and Scripting

Hi,

How can I remove all non numerical data from line, so I don't want to delete the line but to have only the numbers.

e.g.:
#########
123
aaa124
125bbb
126
127
#########

So I want all the leading and trailing non numerical stuff(letters/white space/tabs anything else except [0-9]) stripped.

So from above I would get:
#########
123
124
125
126
127
#########

Thanks a lot for your help!
//Juha

Code:

tr -d "[:alpha:][:punct:]" < inputfile

Try this :

Code:

sed 's/[^[:digit:]]*//g' inputfile

Jean-Pierre.

Thanks! Either of the did not work though:

/tmp]>> tr -d [:digit:] < inputfile

aaa
bbb


So I get only the stuff I don't want.

/tmp]>> sed 's/[^[:digit:]]*//g' inputfile



I get nothing at all.

I have edited my earlier post, check that if it works.

Yep it's getting closer still need to get the trailing and leading white spaces/tabs removed.

Ok this seems to do the trick:
tr -d "[:alpha:][:punct:][:blank:]" < inputfile

Thanks a lot for your help guys!
/Juha