moving text with sed

Shell Programming and Scripting
1

Hi,

I have a configuration file for solaris zones that I generate as part of another script but I need to move part of the text to the end of the file prior to execution and I'm having problems getting the syntax correct on the sed command.

The file looks like this:

create -b
set zonepath=/export/zones/fred
set autoboot=false
set ip-type=shared
add net
set address=1.1.1.1
set physical=nxge0
end
add net
set address=1.1.1.2
set physical=nxge7
end
add rctl
set name=zone.max-swap
add value (priv=privileged,limit=2147483648,action=deny)
end
add dedicated-cpu
set ncpus=2
end
add capped-memory
set physical=2G
end

The lines in bold need to be moved to the end of the file so I tried using the following command in sed but can't get it working.

sed '/rctl/,/end/{h;d};${g;p;}' /tmp/filename

It pattern matches the correct lines and deletes them but doesn't print them at the end of the file.

What have I done wrong?

Thanks

2

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You should use the uppercase version of hold so that the line you took into hold buffer will not be overwritten by the next you take there.
Also the p is not needed when get the buffer.

sed '/rctl/,/end/{H;d};$g' infile

In the output I get an extra blank line - not sure where it comes from though.

3

Thanks for the reply. I tried it on my server which is running Solaris 10 and get a command garbled error. Any ideas?

sed: command garbled: /rctl/,/end/{H;d};$g
4

I use GNU sed - try out putting the {} around the "g" back again.

5

The Hold command puts a newline followed by the contents of the pattern space after the contents of the hold space.

Something like this should work:

sed '/rctl/,/end/{
H
d
}
${
p
g
s/^.//
}
' file

With awk:

awk '/add rctl/,/end/{s=s?s RS $0:$0;next}{print} END{print s}' file
6

Thanks got it working now

sed '/rctl/,/end/{H;d;}
${p;g;s/^.//;}' /tmp/y

Ideally wanted it on one line but if I run it as

sed '/rctl/,/end/{H;d;};${p;g;s/^.//;}' /tmp/y

it doesn't add the lines to the end of the file and seems to ignore everything past the $

7

if you like a one line command, give this a try :

sed -e '/rctl/,/end/{H;d;}' -e '${p;g;s/^.//;}' /tmp/y
8

Thats it, great.

Thanks for all your help guys :slight_smile: