Any character (other than backslash or newline) can be used instead of a slash to delimit the regular expression and the replacement.

Thanks very much. Its resolved.

But that rule doesn't work when I try to delete a line. Like following code doesn't work:
Simply following works alright
but not this
So how do I delete a line using variables that contain slashes?

You can use any delimiter in the search string too, but you have to backslash it (don't ask me why).

Thank you era for fast reply. And that works!
Thanks again.

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hi i have a big file i need every time to cut number of lines related together and ta delete also first two lines in the file.

for example :
while ( $x <= $n)
set var1 = ` cat file | sed '1,2d' | awk '{print $4}' | sed '$x,$d' `
@ x = $x + $t
end

it gives me an error with sed command which contains the variable ??????

can anyone help me!!!!!!!!!!!!!!!!!!!!