find and replace pattren in file

gopalss · #1 (**permalink**) 08-09-2007

Hi,

I have the input file having data as follow:
file1.txt
001 aaa_1:abcd
002 bbb_2:abcd

I want output as,
001xabcd
002xabcd

Here iam trying to replace "{1 space}{alphanumeric string with underscore}{:}" with characrter "x".
I tried to achieve this using sed;but Iam not getting this correctly.

Thanks in advance.

ranj@chn · #2 (**permalink**) 08-09-2007

Code:

sed 's/^\(.*\) \(.*:\)\(.*\)$/\1x\3/g' testfile

lorcan · #3 (**permalink**) 08-09-2007

Code:

sed 's/ .*:/x/' file1.txt

bigearsbilly · #4 (**permalink**) 08-09-2007

perl -i.bak -pe 's/THIS/THAT/g' file ...

gopalss · #5 (**permalink**) 08-09-2007

It's working!!!

Thanks.

robotronic · #6 (**permalink**) 08-09-2007

Agreeing with your request, the {alphanumeric string with underscore} corresponds to "[0-9a-zA-Z_][0-9a-zA-Z_]*". So:

Code:

sed "s/ [0-9a-zA-Z_][0-9a-zA-Z_]*:/x/g" file1.txt

But I think this is better:

Code:

sed "s/ .*:/x/g" file1.txt

Bye

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