194 lines
6.0 KiB
Diff
194 lines
6.0 KiB
Diff
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diff -up hostname/hostname.1.initial hostname/hostname.1
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--- hostname/hostname.1.initial 2009-09-22 14:21:50.000000000 +0200
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+++ hostname/hostname.1 2009-11-06 16:30:20.000000000 +0100
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@@ -91,6 +91,33 @@ will print the domain part of the FQDN (
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complete FQDN of the system is returned with
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.BR "hostname \-\-fqdn" .
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+.LP
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+The function
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+.BR gethostname(2)
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+is used to get the hostname. When the
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+.BR "hostname \-a, \-d, \-f or \-i"
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+is called will
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+.BR gethostbyname(3)
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+be called. The difference in
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+.BR gethostname(2)
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+and
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+.BR gethostbyname(3)
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+is that
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+.BR gethostbyname(3)
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+is network aware, so it consults
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+.IR /etc/nsswitch.conf
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+and
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+.IR /etc/host.conf
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+to decide whether to read information in
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+.IR /etc/sysconfig/network
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+or
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+.IR /etc/hosts
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+
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+To add another dimension to this,
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+the
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+.B hostname
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+is also set when the network interface is brought up.
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+
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.SS "SET NAME"
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When called with one argument or with the
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.B \-\-file
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@@ -106,7 +133,7 @@ and
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use the
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.BR setdomainname (2).
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Note that this is effective only until the next reboot.
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-Edit /etc/hostname for permanent change.
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+After reboot original names from \fI/etc/hosts\fR are used again.
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.LP
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Note, that only the super-user can change the names.
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.LP
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@@ -117,10 +144,10 @@ command (see
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below).
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.LP
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The host name is usually set once at system startup in
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-.I /etc/init.d/hostname.sh
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+.I /etc/rc.d/rc.sysinit
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(normally by reading the contents of a file which contains
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the host name, e.g.
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-.IR /etc/hostname ).
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+.IR /etc/sysconfig/network ).
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.SS THE FQDN
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You can't change the FQDN (as returned by
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@@ -185,7 +212,7 @@ Display the short host name. This is the
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Print version information on standard output and exit successfully.
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.TP
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.I "\-v, \-\-verbose"
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-Be verbose and tell what's going on.
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+Verbose output was removed.
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.TP
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.I "\-y, \-\-yp, \-\-nis"
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Display the NIS domain name. If a parameter is given (or
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@@ -203,9 +230,7 @@ option in
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.BR /etc/resolv.conf .
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.SH FILES
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.B /etc/hosts
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-
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-.B /etc/hostname
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-This file should only contain the hostname and not the full FQDN.
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+.B /etc/sysconfig/network
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.SH AUTHORS
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Peter Tobias, <tobias@et-inf.fho-emden.de>
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.br
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diff -up hostname/hostname.c.initial hostname/hostname.c
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--- hostname/hostname.c.initial 2009-10-27 13:19:28.000000000 +0100
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+++ hostname/hostname.c 2009-11-06 16:14:23.000000000 +0100
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@@ -43,7 +43,7 @@
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#include <err.h>
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#include <rpcsvc/ypclnt.h>
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-#define VERSION "3.00"
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+#define VERSION "3.01"
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enum type_t { DEFAULT, DNS, FQDN, SHORT, ALIAS, IP, NIS, NIS_DEF };
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@@ -112,7 +112,7 @@ localdomain()
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* If something goes wrong, program exits.
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*/
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char *
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-localhost()
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+localhost(enum type_t type)
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{
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char *buf = 0;
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size_t buf_len = 0;
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@@ -134,10 +134,11 @@ localhost()
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|| errno == ENAMETOOLONG);
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/*
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- * a hostname must not contain a dot, so if we find one,
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+ * short hostname must not contain a dot, so if we find one,
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* we also have a domain in here, which we better remove
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*/
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- *(strchrnul(buf, '.')) = '\0';
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+ if (type == SHORT)
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+ *(strchrnul(buf, '.')) = '\0';
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/* gethostname failed, abort. */
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if (myerror)
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@@ -257,7 +258,7 @@ show_name(enum type_t type)
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{
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case DEFAULT:
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case SHORT:
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- printf("%s\n", localhost());
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+ printf("%s\n", localhost(type));
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break;
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case NIS:
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printf("%s\n", localdomain());
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@@ -270,7 +271,7 @@ show_name(enum type_t type)
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = AI_CANONNAME;
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- if ((ret = getaddrinfo(localhost(), NULL, &hints, &res)) != 0)
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+ if ((ret = getaddrinfo(localhost(type), NULL, &hints, &res)) != 0)
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errx(1, "%s", gai_strerror(ret));
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switch (type) {
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@@ -278,7 +279,7 @@ show_name(enum type_t type)
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struct hostent *hp;
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int i;
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- if ((hp = gethostbyname(localhost())) == NULL)
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+ if ((hp = gethostbyname(localhost(type))) == NULL)
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errx(1, "%s", hstrerror(h_errno));
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for (i = 0; hp->h_aliases[i]; i++) {
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@@ -449,7 +450,7 @@ main(int argc, char **argv)
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if (boot && (name == NULL || name[0] == '\0')) {
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free(name);
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- name = localhost();
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+ name = localhost(type);
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if (name[0] == '\0' || !strcmp(name,"(none)"))
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strcpy(name, "localhost");
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}
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diff -up hostname/Makefile.initial hostname/Makefile
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--- hostname/Makefile.initial 2009-09-22 14:21:50.000000000 +0200
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+++ hostname/Makefile 2009-11-06 16:14:23.000000000 +0100
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@@ -7,26 +7,28 @@ OBJS=hostname.o
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hostname: $(OBJS)
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$(CC) $(CFLAGS) -o $@ $(OBJS) -lnsl
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- ln -fs hostname dnsdomainname
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- ln -fs hostname domainname
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- ln -fs hostname ypdomainname
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- ln -fs hostname nisdomainname
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install: hostname
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install -d ${BASEDIR}/usr/share/man/man1
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- install -o root -g root -m 0644 hostname.1 ${BASEDIR}/usr/share/man/man1
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+ install -m 0644 hostname.1 ${BASEDIR}/usr/share/man/man1
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ln -fs hostname.1 ${BASEDIR}/usr/share/man/man1/dnsdomainname.1
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ln -fs hostname.1 ${BASEDIR}/usr/share/man/man1/domainname.1
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ln -fs hostname.1 ${BASEDIR}/usr/share/man/man1/ypdomainname.1
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ln -fs hostname.1 ${BASEDIR}/usr/share/man/man1/nisdomainname.1
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- install -o root -g root -m 0644 hostname.1.fr ${BASEDIR}/usr/share/man/fr/man1/hostname.1
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+ install -d ${BASEDIR}/usr/share/man/fr/man1
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+ install -m 0644 hostname.1.fr ${BASEDIR}/usr/share/man/fr/man1/hostname.1
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+ ln -fs hostname.1 ${BASEDIR}/usr/share/man/fr/man1/dnsdomainname.1
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+ ln -fs hostname.1 ${BASEDIR}/usr/share/man/fr/man1/domainname.1
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+ ln -fs hostname.1 ${BASEDIR}/usr/share/man/fr/man1/ypdomainname.1
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+ ln -fs hostname.1 ${BASEDIR}/usr/share/man/fr/man1/nisdomainname.1
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+
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install -d ${BASEDIR}/bin
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- install -o root -g root -m 0755 hostname ${BASEDIR}/bin
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- ln -f hostname ${BASEDIR}/bin/dnsdomainname
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- ln -f hostname ${BASEDIR}/bin/domainname
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- ln -f hostname ${BASEDIR}/bin/nisdomainname
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- ln -f hostname ${BASEDIR}/bin/ypdomainname
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+ install -m 0755 hostname ${BASEDIR}/bin
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+ ln -fs hostname ${BASEDIR}/bin/dnsdomainname
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+ ln -fs hostname ${BASEDIR}/bin/domainname
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+ ln -fs hostname ${BASEDIR}/bin/nisdomainname
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+ ln -fs hostname ${BASEDIR}/bin/ypdomainname
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clean:
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-rm -f $(OBJS) hostname dnsdomainname domainname nisdomainname ypdomainname
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