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I want to print only the lines that meet the criteria : "worde:" and "wordo;"
I got this far:
sed -n '/\([a-zA-Z]*\)\1e:\1o;/p;'

But it doesn't quite work.
Can someone please perfect it...

Thank you Zaxxon, can go from this :-)

Can you explain how I would have done my initial desire though, i.e. setting a variable to a regex?
Even if I remove the $ sign
awk 'var ~ /:.*$/ {print...

Hi there,
I really didn't want to have to waste people's time and ask this, but after 2 hours and running out of my own time I've decided to ask..

Basically I have a file in the format:

word:...

Hi there,

I have a file that goes like this:

b_cdbc_db_cd_bcd_aaa-bcd_cd

That type of format, for many lines.

What I want to do is enter a new line character for after the _
I write an...

I came across this sed expression, and it does exactly what I want.
However I haven't got the faintest clue how it does it and thus do not feel capable of using it.

Can someone please explain how...

Yes I know this is a bad use of cat, but just ignore it please :P
My problem is with sed.

File: "newFile" contains:
day

Command I run:
cat newFile | sed 's/day/night'

This returns:
...

Thank you,

I'm trying to find the text that occurs for both numbers not just one, I'm sure there's an easy way to do this but I can't see it. Can someone point me in the right direction? Not just give me an...

I have list of data I have cut down to format:

[28/Feb/2007
[27/Feb/2007
... etc etc

I am using sed command to remove the [

sed 's/[//'
Returns error:

sed: -e expression #1, char 5:...