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I have been trying to come up with a way to grab the NTP IP address in /etc/ntp.conf and use it in a variable for one of my scripts. Basically, this would grab it and auto populate a reports file with all network-like info, of which the NTP address is an entry.

*Also, for the network that I am working on, it doesn't connect to the Internet, so it doesn't have the usual FQDN's for the 'server' line.

I know sed and awk can grab the entry after "server" in ntp.conf, but there are a lot of words throughout the file with "server", which wouldn't work for me.

So, I was thinking of adding a commented out phrase to the end of the actual line to search for, so it would narrow it down to a unique line in the file:


...then, somehow, grab just the IP.

Can someone help me out, using the above example "server" entry and trim off the word "server" and "#NTP_IP", along with the spaces between those words?

thanks in advance...

also, I should have noted, that this IP will change, depending on which network it is on...so I can't search for the static IP.

hi,

works perfectly! Thanks!

Well, it works, don't get me wrong, but I am having another issue.

Here is the relevant code from my overall script:



It properly echoes the correct IP from /etc/ntp.conf to the screen, but does not go in and change the TSVR placemarker in the net_reports.txt file.
It gives this error:
sed: -e expression #1, char 25: unterminated `s' command

any ideas?

Hi,

probably there's one or more trailing space(s) in $NTADDR
see it with
also you could avoid such behaviour from sed by double quoting the whole command

thanks again, it was a trailing space. Using the double quotes fixed it.

Using awk(1) to retrieve the IP address, and ed(1) to edit the file.

Command line version:


Script version:


Unfortunately you can't hold something in ed(1)'s buffer or keep the last one before editing another file.