sed and double quotes

Shell Programming and Scripting
1

I have not seen anything yet in your forum to answer this problem.
Here is my sed command.
I want to change
Build Apache module" off
to
Build Apache module" on
This is what I am trying.

sed "s_Build Apache module\" off_Build Apache module\" on_" /usr/ports/lang/php5/Makefile /usr/ports/lang/php5/Makefile

Return is
Unmatched ".

I have tried double escaping double quotes but to no avail.

If I use single quote encapsulation it works but only prints to the screen.

Any help would be greatly appreciated.

2

You try this code

sed 's/Build Apache module\" off/Build Apache module\" on/g' inp_file

Here the inp_file contains the line as follows

Build Apache module" off

I got the output as follows

Build Apache module" on
3

Actually, you will find many more than this if you really search every thing

And this can do what you want...

sed 's#\(Build Apache module\"\) off#\1 on#' infile
4

Thank you for both answers.
Both answers were encapsulated in single quotes.
As I said, single quotes will change the output to the window but not change the file text.
Anyone else?

5

Try:

perl -i -ne 's/off$/on/g;print;' file
6 
awk '/^Build Apache module/ gsub(/off/,"on",$0)' /usr/ports/lang/php5/Makefile
7

Another single quote encapsulted reply that will not change the file just the output to the screen. I am trying to replace text in an actual file.
I'm guessing I'm posting in the wrong place.
Thanks anyway.

8

triumdh,

If your shell support "sed -i" then you can edit the source file , other wise you can go for the perl solution suggested by Jacob.

9

Hi, how to replace a string with other string containing backslash in shell? Like I have to replace string PASSWORD with a variable that contains something like \#!\sfREVSDC/fsqWEQFWsdd\=\= . Basic sed is not working. it throughs error due to forward slash(/). If no forward slash, it works but backslash is being removed up on replace. Pls help on this using any shell script-need not be sed. Thanks in adv.

KHR

10

sed usually uses slashes, not underscores.

sed "s/Build Apache Module\" off/Build Apache Module\" on/g" whateveryourfilenamewas