Linux-supported File systems (Part-2)

6.   Sample /etc/fstab

• ·        A/etc/stab file look like as follows;

Table 2: /etc/fstab
#device	Mount-point	Type		Options (dump)		Pass-no
/dev/hda3	/	Ext2		Defaults		1		1
/dev/hda1	/boot	Ext2		Defaults		1		2
/dev/hda5	/usr	Ext2		Defaults		1		2
/dev/hdb1	/usr/local	Ext2		Defaults		1		2
/dev/hdb2	/home	Ext2		Defaults		1		2
None	/proc	Proc		Defaults		0		0
/dev/scd0	/mnt/cdrom	Iso9660		Noauto.user,ro		0		0
/dev/fd0	/mnt/floppy		Auto		Noauto.users		0	0

7.   Filesystem Types

•   The network filesystems includes nfs (Unix-specific) and smbfs (Windows or Samba) 

Table 3: Common Filesystem
Type	Usage
Ext2	Refers tothestandrd Linux filesystem
Iso9660	Refers to the filesystems used on CD ROM
Proc	Refers to the way a kernel report to system information to user processes
Vfat	Refers to the filesystems used by Windows 95

8.   Mount options:  Mount options are those options thatare used in /etc/fstab and are separated by comma .  These options are used with –o on the mount command line to perform specific functions.

Table 4: Common Mont Options
Option	Description
noauto	Prevents thefilesystem being mounted ;at bootup. Useful for removable media
ro	Mounts the filesystem as read-only
Users	Lets non-root users mount and unmount this filesystem
user	Refers to like users, but non-rooot users can only unmount filesystems that theythemselves mounted.

9.   Other colums in /etc/fstab

•  The fifth column is called dump and is used torestore backup utilities.  You can use 1 for normal filesystems, and 0 for removable filesystem

•  The sixth column is called pass-no

•   Controls the order in which automatically-mounted filesystems are checked by fsck

• Use 1 for the root filesystem

• Use 0 for filesystems that aren’t mounted at boot-up

• Use2 for other filesystem

10.    Mounting a File

•  Linux can mount a filesystem stored in a normal file, instead of a disk by a disk ;by using loop devices