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<H1><A NAME="odrzavanje"></A> <A NAME="s6">6. Odr¾avanje.</A></H1>
<P><B>Samo neka radi.</B>
<P>Jedna je zadaæa potrebna za odr¾avanje <CODE>named</CODE>a, osim da ih pu¹ta¹ da
rade. To je redovno mijenjanje root.hints datoteke. Najlak¹i naèin je
kori¹tenje programa `<CODE>dig</CODE>'. Prvo pokreni <CODE>dig</CODE> bez parametara, i
dobit æe¹ root.hints svog servera. Onda pitaj jedan od izlistanih
korijenskih servera sa 'dig @rootserver'. Vidjet æe¹ da izlazni podaci jako
slièe onima u root.hints datoteci. Saèuvaj ih u datoteku (<CODE>dig
@e.root-servers.net . ns > root.hints.new</CODE>) i zamijeni staru
root.hints datoteku s novom (root.hints.new).
<P>Zapamti da treba restartati <CODE>named</CODE> nakon promjene cache datoteke.
<P>Al Longyear mi je poslao ovu skriptu koja se mo¾e pokrenuti automatski da
obnovi root.hints, unesena u crontab da se pokrene jednom
mjeseèno i zaboravi. Ova skripta pretpostavlja da ima¹ pode¹en i radeæi
e-mail, te da je alias `<CODE>hostmaster</CODE>' definiran. Mora¹ je hackirati da je
uskladi¹ sa svojim postavkama. (saèuvati kao izvr¹nu datoteku
/etc/cron.monthly/hints.new op.prev.)
<P>
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<PRE>
#!/bin/sh
#
# Update the nameserver cache information file once per month.
# This is run automatically by a cron entry.
#
(
echo "To: hostmaster <hostmaster>"
echo "From: system <root>"
echo "Subject: Automatic update of the named.conf file"
echo
export PATH=/sbin:/usr/sbin:/bin:/usr/bin:
cd /var/named
dig @rs.internic.net . ns >root.hints.new
echo "The named.conf file has been updated to contain the following information:"
echo
cat root.hints.new
chown root.root root.hints.new
chmod 444 root.hints.new
rm -f root.hints.old
mv root.hints root.hints.old
mv root.hints.new root.hints
ndc restart
echo
echo "The nameserver has been restarted to ensure that the update is complete."
echo "The previous root.hints file is now called /var/named/root.hints.old."
) 2>&1 | /usr/lib/sendmail -t
exit 0
</PRE>
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<P>Neki su mo¾da vidjeli root.hints datoteku koja je dostupna FTP-om od
InterNIC-a. Molim vas, <B>nemojte</B> koristiti FTP da obnovite
root.hints, jer je gornja metoda puno sklonija mre¾i.
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