--On Tuesday, September 01, 2009 13:55:37 -0500 Mak Kolybabi <m...@kolybabi.com> wrote:

On 2009-09-01 18:03, Paul Schmehl wrote:
I found a sed tutorial once that did this, but I can't seem to find it
again. I have a file with multiple lines, each of which contains a single
ip followed by a /32 and a comma.  I want to combine all those lines into a
single line by removing all the newline characters at the end of each line.

What's the best/most efficient way of doing that in a shell?

Personally, I'd use:
% tr -d '\n' < inputfile

Personally, I like your solution.  :-)

Paul Schmehl, Senior Infosec Analyst
As if it wasn't already obvious, my opinions
are my own and not those of my employer.
"It is as useless to argue with those who have
renounced the use of reason as to administer
medication to the dead." Thomas Jefferson

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