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Full Discussion: Linux Containers - /proc mounting and other queries
Top Forums UNIX for Beginners Questions & Answers Linux Containers - /proc mounting and other queries Post 303027076 by sreyan32 on Saturday 8th of December 2018 02:11:15 AM
Old 12-08-2018
--- Post updated at 12:41 PM ---

Quote:
Originally Posted by MadeInGermany
The filesystem driver can deny a second mount. But in fact ext3, ext4, xfs allow mutiple primary mounts.
Code:
# ls -ldi /boot /mnt
     2 drwxr-xr-x  4 root root 3072 May 24  2014 /boot
260609 drwxr-xr-x  5 root root 4096 Sep 25 11:40 /mnt
# df /boot
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1               101146     37017     58907  39% /boot
# mount /dev/sda1 /mnt
# ls -ldi /boot /mnt
2 drwxr-xr-x  4 root root 3072 May 24  2014 /boot
2 drwxr-xr-x  4 root root 3072 May 24  2014 /mnt
# mount | grep /dev/sda1
/dev/sda1 on /boot type ext3 (rw)
/dev/sda1 on /mnt type ext3 (rw)
# umount /mnt

The same exercise with a bind mount:
Code:
# mount --bind /boot /mnt
# ls -ldi /boot /mnt
2 drwxr-xr-x  4 root root 3072 May 24  2014 /boot
2 drwxr-xr-x  4 root root 3072 May 24  2014 /mnt
# mount | grep /dev/sda1
/dev/sda1 on /boot type ext3 (rw)
# mount | grep /mnt
/boot on /mnt type none (rw,bind)
# umount /mnt

Yes but how is a bind mount different from a normal mount?

According to this question on SO

Bind mounts reflect the directory structure from the source and does not allow modifications on the disk. Its suppose to be part of the live filesystem. But then my question is what is the difference between a normal mount?

Does this question about bind mounts deserve its own personal thread?

Your example just shows the type as none and an extra attribute as bind in the mount. What does this imply?
 

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LEARN ABOUT OSX

installgrub

installgrub(1M) 														   installgrub(1M)

NAME

       installgrub - install GRUB in a disk partition or a floppy

SYNOPSIS

       /sbin/installgrub [-fm] stage1 stage2 raw-device

       The installgrub command is an -only program. GRUB stands for GRand Unified Bootloader.

       installgrub  installs  GRUB  stage  1  and  stage  2  files on the boot area of a disk partition. If you specify the -m option, installgrub
       installs the stage 1 file on the master boot sector of the disk.

       The installgrub command accepts the following options:

       -f

	   Suppresses interaction when overwriting the master boot sector.

       -m

	   Installs GRUB stage1 on the master boot sector interactively.

       The installgrub command accepts the following operands:

       stage1

	   The name of the GRUB stage 1 file.

       stage2

	   The name of the GRUB stage 2 file.

       raw-device

	   The name of the device onto which GRUB code is to be installed. It must be a character device that is readable and writable.  For  disk
	   devices,  specify  the  slice  where  the  GRUB  menu  file	is  located.  (For Solaris it is the root slice.) For a floppy disk, it is
	   /dev/rdiskette.

       Example 1: Installing GRUB on a Hard Disk Slice

       The following command installs GRUB on a system where the root slice is c0d0s0:

       example# /sbin/installgrub /boot/grub/stage1 
		/boot/grub/stage2 /dev/rdsk/c0d0s0

       Example 2: Installing GRUB on a Floppy

       The following command installs GRUB on a formatted floppy:

       example# mount -F pcfs /dev/diskette /mnt
       # mkdir -p /mnt/boot/grub
       # cp /boot/grub/* /mnt/boot/grub
       # umount /mnt
       # cd /boot/grub
       # /sbin/installgrub stage1 stage2 /dev/rdiskette

       /boot/grub

	   Directory where GRUB files reside.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       boot(1M), fdisk(1M), fmthard(1M), kernel(1M), attributes(5)

       Installing GRUB on the master boot sector (-m option) overrides any boot manager currently installed on the machine. The system will always
       boot the GRUB in the Solaris partition regardless of which fdisk partition is active.

								    24 May 2005 						   installgrub(1M)
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