Sed - An Introduction and Tutorial by Bruce Barnett

It isn't obvious,but?sed?could be used instead of?tr. You can embed a new line in a substitute command,but you must escape it with a backslash. It is unfortunate that you must use "n" in the left side of a substitute command,and an embedded new line in the right hand side. Heavy sigh. Here is the example:

#!/bin/sh
sed '
s/ /
/' | 
sed ' {
    y/abcdef/ABCDEF/
    N
    s/n/ /
}'

Click here to get file:?

Sometimes I add a special character as a marker,and look for that character in the input stream. When found,it indicates the place a blank used to be. A backslash is a good character,except it must be escaped with a backslash,and makes the?sed?script obscure. Save it for that guy who keeps asking dumb questions. The?sedscript to change a blank into a "" following by a new line would be:?#!/bin/shsed 's/ //' file

Click here to get file:?

Yeah. That's the ticket. Or use the C shell and really confuse him!?#!/bin/csh -fsed 's/ /\/' file

Click here to get file:?

A few more examples of that,and he'll never ask you a question again! I think I'm getting carried away. I'll summarize with a chart that covers the features we've talked about:

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