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If there is a '/' character in the expression, it will be garbled. Any way to get around that?

Hi, I tried the script, and it works. Only one thing, what if express1 in the script actually contains spaces? It didn't work when that happened. Please advise. Thanks.

thanks, got it!

I tried your script, and i had to input the command:
script_name 1 4 yourfile for it to work on my file.

Oh, i'm sorry, you know what the unique expressions are.

I just actually need to delete the first two and last three rows. Any solutions?

I haven't used perl before....but I need to get this done today. Is there another way?

Is it possible to delete lines by their number? Also, I'd like to delete the last 3 rows of a file too. So from the front and back. Thanks.

Ok, this is what I'm trying to do
--------------------------------------------------------------------
before:
...
...
<unique expression1 here> XXX
...
...
...
<another unique expression2...

How would I delete white spaces in a specified file?

Also, I'd like to know what command I would use to take something off a regular expression, and put it onto another.
ie.
.
.
.
expression1...