File for predefined mountpoints
The /etc/fstab file contains descriptive information about filesystems. Programs read it, but don't write it; it's the duty of the system administrator to properly create and maintain this file. Each filesystem is described on a separate line; fields on each line are separated by tabs or spaces. Lines beginning with # are comments.
If you specify the -a option to the mount command, the utility mounts the devices that are listed in /etc/fstab. The format of the /etc/fstab used with the mount utility is as follows:
specialdevice mountpoint type mountoptions
For example, the following entry in /etc/fstab:
/dev/hd0t77 /mnt/fs qnx4 rw
is equivalent to calling:
mount -t qnx4 /dev/hd0t77 /mnt/fs
The mountoptions field is a comma-separated list of values that must contain, at a minimum, one of ro or rw to indicate a read-only or a read-write mount.
By default, the mount is performed with the type as if the -t option had been specified (device and server doing the mount are the same) but to get the -T type behavior, you should specify allservers in the options.
The following sample /etc/fstab indicates the mapping of the different configurations:
#This is a sample file that shows the mapping of command line #arguments to the fstab entries and how they would be invoked. #The "implied" argument is not generally required, but some #servers may differentiate between implied and specified entries. # mount -b -vvv -t mytype /my/specialdev1 /my/mountpoint1 # mount -vvv /my/mountpoint1 /my/specialdev1 /my/mountpoint1 mytype rw # mount -b -vvv -t mytype /my/specialdev2 # mount -vvv /my/specialdev2 /my/specialdev2 / mytype rw,implied # mount -b -vvv -T mytype /my/specialdev3 /my/mountpoint3 # mount -vvv /my/mountpoint3 /my/specialdev3 /my/mountpoint3 mytype allservers,rw # mount -b -vvv -T mytype /my/specialdev4 # mount -vvv /my/specialdev4 /my/specialdev4 / mytype allservers,implied,rw