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gaurav541

09-22-2014 05:36 AM

Sed problem

I am new to Linux and I am currently trying to learn sed. After executing this command I am little confuse

echo "123 abc" | sed 's/[0-9]/& &/'

output
1 123 abc

why it is not "1 1 abc" as & remember matched pattern.
Please explain me.

syg00

09-22-2014 06:05 AM

Change it to this and see if that explains it

Code:

echo "123 abc" | sed 's/[0-9]/---> & <---/'

pan64

09-22-2014 06:20 AM

or even:

echo "123 abc" | sed 's/[0-9]/---> & <---> & <---/'

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