Don't have a linux os booted near by, but in a windows command prompt
(running GnuWin32 Sed, not sure what version) the following works:
SED -r "s/(....)/\1Z/g" filein > fileout
You need to adjust syntax for linux - I think double quote becomes
single quote is main one?
Regards, Bryce Stenberg.
________________________________
From: Glenn Cogle [mailto:[email protected]]
Sent: Tuesday, June 28, 2011 1:07 PM
To: Canterbury Linux Users Group
Subject: [Linux-users] help wanted with sed usage
Hi all sed gurus (& wannabes like me),
Wanting to `sed` beyond my present understanding;
echo abcdefghijklmnopqrstuvwxyz | sed 'keep first 5 chars, then
append a Z to every fourth char thereafter, and keep the leftovers too'
ie
abcdefghiZjklmZnopqZrstuZvwxyZz
I think sed would be capable of this - but haven't proven it
yet.
gc
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