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# 1  
Old 09-28-2006
combining sed commands

I would like to change the lines:
originalline1
originalline2

to:
originalline1new
originalline1newline

originalline2new
originalline2newline

To do this, id like to combine the commands:

sed 's/^/&new/g' file > newfile1

and

sed '/^/ a\\
newline\\
\\
' newfile1 > newfile2


Can I do it this way? Is there another way?
Help would be greatly appreciated!
Thanks!
# 2  
Old 09-28-2006
You can combine multiple sed statements by concatenating them with semicolons, like 's/a/b/g;s/c/d/g'. I'm not sure those statements will do what you want, though.

Try:
Code:
sed -r 's/^(.*)$/\1new\n\1newline\n/'

Instead of using two statements, I use extended regexes, which support backreferences -- the \1 gets replaced with the contents of the brackets, letting me print it twice without two expressions.

Last edited by Corona688; 09-28-2006 at 12:38 PM..
# 3  
Old 09-28-2006
Thanks for the reply, but i tried it and it said:
sed: illegal option -- r

so I removed the -r and it said:
sed: command garbled: s/^(.*)$/\1new\n\1newline\n/

I dont understand why!
 

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