Lantronix SCS1620 Guia do Utilizador descarregar pdf (Página 102)

SCSxx05/SCSxx20 User Guide 8: Commands

8-15

To mount a file system at boot time, the /etc/fstab file must have an entry that is

associated with the directory to mount. Following is an example of how to use

this facility to automatically mount an NFS file on the SCS.

In /etc/fstab the following entry must be present:

/dev/device /dir/to/mount ftype parameters fs_freq fs_passno

where

/dev/device

The device to be mounted. In the case of mounting an NFS

file system, the entry should be in the form of

server name:/dir/exported, where server name is the

name of the NFS file server, and the /dir/exported is the

exported directory found on the NFS server.

/dir/to/mount

The location at which the file system should be mounted on

the SCS. This directory has to be defined on the SCS, or it

will not work.

ftype

The file system type. For an NFS-mounted file system, use

nfs.

parameters

These are the parameters that are passed to the mount

command. They are in a comma-delimited format.

fs_freq

This is used by dump to determine whether a file system

needs to be dumped.

fs_passno

The fsck program uses this to determine the order to check

disks at boot time.

An example of an entry in /etc/fstab is as follows:

erh62:/export/var/test /var/test nfs rw,/jointfilesconvert/254244/bg,intr,soft 0 0

To manually test whether the system will automatically mount a file system at

boot time, enter the following command to manually mount the file:

mount –a

This command reads the /etc/fstab file and mounts all of the entries in the file

that are not already mounted. Once the system verifies the /etc/fstab file, you

must configure the SCS to have the portmap service and the netfs script

executed when the system boots.

To do this, execute the chkconfig command for both. The following commands

configure the SCS:

chkconfig –add portmap

chkconfig –add netfs

The system is now configured to start the portmap service and make sure the

NFS file system is mounted when the system boots.

Mounting File Systems Dynamically Using autofs

autofs is a kernel module that allows the SCS to dynamically mount file systems

only when needed. An example would be to have all of the user’s home

directories on an NFS-mounted disk. When the user logs into the SCS, the

system immediately mounts the user’s directory instead of at boot.

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