HP-UX Reference (11i v2 03/08) - 4 File Formats (vol 8)

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exports(4) exports(4)
hostname; this HP-only feature will be obsoleted in a later release of HP-UX.
netgroup
A netgroup contains a number of hostnames. With a server configured for
DNS naming in the nsswitch "hosts" entry, any hostname in a netgroup must
be represented as a fully qualified DNS name.
DNS suffix
To use domain membership the server must use DNS to resolve hostnames to
IP addresses; that is, the "hosts" entry in the
/etc/nsswitch.conf
must
specify "dns" ahead of "nis" or "nisplus", since only DNS returns the full
domain name of the host. Other name services like NIS or NIS+ cannot be
used to resolve hostnames on the server, because when mapping an IP
address to a hostname, they do not return domain information. For example,
NIS or NIS+
129.144.45.9 --> "myhost"
DNS
129.144.45.9 --> "myhost.myd.myc.com"
The DNS suffix is distinguished from hostnames and netgroups by a prefixed
dot. A dot by itself will match "myhost" but not "myhost.myd.mycy.com". This
single dot feature can be used to match hosts resolved from NIS and NIS+
rather than DNS.
network
The network or subnet component is preceded by an at-sign (@). It can be
either a name or a dotted address. If a name, it will be converted to a dotted
address by
getnetbyname (see getnetent (3N)). Entries in
/etc/networks must contain all four octets in order to be valid.
The network prefix assumes an octet aligned netmask determined from the
zero octets in the low order part of the address. In the case where network
prefixes are not byte-aligned, the syntax will allow a mask length to be
specified explicitly following a slash (/) delimiter. Where the mask is the
number of leftmost contiguous significant bits in the corresponding IP address.
- A prefixed minus sign (-) denies access to that component of access_list. The
list is searched sequentially until a match is found that either grants or denies
access, or until the end of the list is reached. This option is valid only in con-
junction with hostname, network and DNS Suffix. If prefixing a hostname and
you are configured for DNS naming, you must fully qualify the hostname.
async Specifying async increases write performance on the NFS server by causing asynchro-
nous writes on the NFS server. The async option can be specified anywhere on the com-
mand line after directory . Before using this option, refer to WARNINGS below.
# A # character anywhere in the file indicates a comment that extends to the end of the
line.
A directory name with no accompanying name list allows any machine to mount the given directory.
/etc/exports contains a list of file systems and the access_lists or machine names allowed to
remotely mount each file system. The file system names are left-justified and followed by a list of names
separated by white space. A file system name with no accompanying name list means the file system is
available to everyone.
A
# anywhere in the file indicates a comment extending to the end of that line.
EXAMPLES
/usr/games cocoa fudge # export to only these machines
/usr -access=clients # export to my clients
/usr/local # export to the world
/usr2 -access=bison:deer:pup # export to only these machines
/var/adm -root=bison:deer # give root access only to these
/usr/new -anon=0 # give all machines root access
/usr/temp -rw=ram:alligator # export read-write only to these
Section 4−−50 Hewlett-Packard Company − 2 − HP-UX 11i Version 2: August 2003