Sed script for changing different lines into one line

I had a file with different server names on each line but I needed them in a single line so that I can use multiterm as:

multixterm -xc "ssh root@%n" server1 server2 server3 server4 ....

my server file has the names as follows:


server1
server2
server3
server4
.....

......


To achieve this we have many options, some of them are:


Use sed as follows:

sed -n '/:/{x;1!s/\n/ /g;1!p;d;};H;${g;s/\n/ /g;p;}' serverlist

Use awk as:

awk '/: /{if(NR>1)print p;p=$0;next}{p=p FS $0}END{print p}' infile

References:

http://www.unix.com/shell-programming-scripting/147171-combine-multiple-lines-single-line.html