showmount(1M) showmount(1M)
NAME
showmount - show information on available or mounted NFS resources
SYNOPSIS
showmount [-a] [-d] [-e] [host]
DESCRIPTION
This command provides information on:
- the names of the clients which have mounted file systems from a
server and the names of the file systems
- the file systems which have been exported for mounting by a server.
The showmount command is used, for example,
- when the system administrator, prior to mounting a remote file sys-
tem, wants to know whether this file system has been exported
- when the network administrator wants to know how big the burden is
on the server, just in case it should prove necessary to redistri-
bute the workload
- when the system administrator, prior to shutting down a server,
wants to know which users have mounted file systems from this
server. These users have to be informed that the system is going to
be shut down.
The showmount command takes the above information from the mountd dae-
mon on the server. This daemon has to be available on the server.
OPTIONS
no argument
outputs the names of the clients which have mounted file systems
from the computer where the command was given.
-a produces a list with the names of the file systems and the
clients which have been mounted from the server host. The output
has the following format:
hostname:directory
hostname name of the client
directory name of the mounted file system
-d outputs the names of all file systems from the server host which
are mounted on clients.
-e outputs the names of the file systems exported by the server
host.
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showmount(1M) showmount(1M)
host is the name of the server from which information is requested.
If the argument is not specified, the name which is output with
the uname -n command is used as the default value.
EXAMPLES
1) The system administrator is working on the computer york and would
like to know which clients have mounted file systems from york.
Input:
showmount
Output:
mountainview tokyo
The clients mountainview and tokyo have mounted file systems from
the server york.
2) The system administrator is working on the server york and wants to
know which clients have mounted which file systems from the com-
puter york.
Input:
showmount -a
Output:
mountainview:/home/steven
tokyo:/home/steven
The file system /home/steven, which is administered by the server
york, is mounted on the clients mountainview and tokyo.
3) The system administrator is working on the server york and wants to
know which file systems are mounted on clients:
Input:
showmount -d
Output:
/home/steven
Only the file system /home/steven from the server york has been
mounted on clients.
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showmount(1M) showmount(1M)
4) The system administrator is working on the computer york and wants
to know which file systems have been exported for mounting and for
whom they have been exported.
Input:
showmount -e
Output:
export list for york: /home1 (everyone)
/home dublin
From the computer york, the file system /home1 has been exported
for the user group everyone, while the file system /home has been
exported for the computer dublin.
5) The network administrator wants to know which clients have mounted
file systems from the server mountainview.
Input:
showmount mountainview
Output:
dublin
york
portland
The computers dublin, york, portland have mounted file systems from
the computer mountainview.
If the system run of a client which has mounted file systems from a
server has not been properly terminated, the entry in the file
/etc/rmtab in the server is not deleted. In other words, the informa-
tion output by the showmount command is inconsistent.
FILES
/etc/rmtab
/etc/dfs/sharetab
SEE ALSO
uname(1), mountd(1M).
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