mounting and whats all this device do?

blackzone · 07-10-2006, 04:27 PM

I saw all this device when typing "mount", what's all this device do? This is from Fedora Core 5.

sysfs on /sys type sysfs (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
automount(pid1424) on /net type autofs (rw,fd=4,pgrp=1424,minproto=2,maxproto=4)

manishsingh4u · 07-10-2006, 04:46 PM

It tells -
1) which filesystems are currenly mounted

Code:

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

2) which device files these filesystems belong to

Code:

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

3) What is the mode in which these devices are mounted.

Code:

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

4) which location they are mounted upon.

Code:

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

manishsingh4u · 07-10-2006, 05:33 PM

In linux, the files and folders are located logically in a tree like structure. Although the location of actual data could be different

Code:

                          Root /
                            |
           |                       |                    |          |
      directory1              directory2              file1       mnt
            |                     |                                |
         |        |         |           |                         mydir
   directory1   file1     file1       file2
       |
   |    |     |
file1 file2 file3

Now suppose you have some other devce, for eg. a partition on your hard disc whose device name is /dev/hda5. And which has 2 files and 1 directory.

Code:

                               /dev/hda5
                                  }
                       |           |             |
                  directory1     file1          file2

Now u want to access files on /dev/hda5 partition on your linux system. Then u will need to mount (attach) this /dev/hda5 to the root (/) filesystem at any empty directory (mount point) whjich lies some where on (/) physically to make it available for usage.
Suppose you mount /dev/hda5 to some directory eg mydir in dirctory /mnt, as
A command named mount can be used as

Code:

mount /dev/hda5 /mnt/mydir

So, now your file structure on / will be like this logically

Code:

                          Root /
                            |
           |                       |                    |          |
      directory1              directory2              file1       mnt
            |                     |                                |
         |        |         |           |                         mydir
   directory1   file1     file1       file2                         |
       |                                                   |          |    |
   |    |     |                                         directory1   file1 file2
file1 file2 file3

There are lots of filesystems supported in linux. To know about these filesytems, you may visit this link http://wiki.linuxquestions.org/wiki/Filesystem or search google.