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Top Forums UNIX for Dummies Questions & Answers Use awk to change an IP format Post 302768449 by MrEddy on Friday 8th of February 2013 02:49:56 PM
Old 02-08-2013
Use awk to change an IP format

Basically I am trying to run a standard output of IP address with a port number into another command but I need to change it from.

74.125.224.194.80 into 74.125.224.194:80

One command wants a period before the port the subsequent one wants a colon.

So is there anyway I can feed 74.125.224.194.80 into awk and have it just substitute a : in for the 4th period it finds?

I can find all kinds of ways to do global substitutions but I don't need all periods to have a : just the last one.

Thanks in advance!
 

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POC-FEC(1)							   User Command 							POC-FEC(1)

NAME
poc-fec - send FEC MP3 streams SYNOPSIS
poc-fec [ -s address ] [ -p port ] [ -t ttl ] [ -q ] [ -k fec_k ] [ -n fec_n ] files... DESCRIPTION
poc-fec is a streaming server sending mp3 data using a custom FEC protocol. The streamed MP3 frames are first decomposed in autonomous data units (ADUs). These ADUs are grouped into ADU groups, which are encoded redundantly using a FEC method by Luigi Rizzo. A group of k ADUs is encoded as n data packets. Any k of these n data packets is sufficient to recover the original k ADUs. It sends the files in the order given on the command-line. Use the filename - to stream from standard input. Normally, the FEC protocol is used to stream to multicast groups. OPTIONS
-s address Specify the address to send to (default 224.0.1.23). -p port Specify the port to send to (default 1500). -t ttl Specify the TTL parameter to be set on outgoing parameters (default 1). -q Don't output any information on standard error. -k fec_k Specify the number of ADUs that will be encoded as an ADU group (default 20). -n fec_n Specify the number of packets that the ADU groups will be encoded to (default 25). This number must be greater than the fec_k param- eter. EXAMPLES
poc-fec -s 224.0.1.24 -p 8989 -t 2 -k 16 -n 32 bla.mp3 Send the file bla.mp3 using the RTP RFC fec protocol to the address 224.0.1.24 on port 8989, and set the TTL to 2. MP3 frames of bla.mp3 are converted to ADUs and grouped in ADU groups of 16 ADUs. These 16 ADUs are encoded into 32 packets and streamed. A client will have to receive at least 16 packets to recover the original ADUs. AUTHORS
Manuel Odendahl <manuel@bl0rg.net>, Florian Wesch <dividuum@bl0rg.net> February 2005 POC-FEC(1)
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