Mounted dir disappears after restart

Question

I ran this command on RHEL 6.3:

# mount /dev/cdrom /mnt

Everything is okay, but after a restart the mounted dir, /mnt disappears... I don't know where is it going.

Answer 1

Mount doesn't permanently mount the file. To do that, you must edit your /etc/fstab file. man fstab will give you all the documentation you need.

Answer 2

Because when you boot up, nothing is mounted yet and each filesystem must be mounted in turn. The list of filesystems that should be automatically mounted during boot is in /etc/fstab so if you want your cdrom to be mounted automatically on each boot, you must add a line for it to that file.

Answer 3

just add this entry to /etc/fstab file :

    /dev/cdrom         /mnt/cdrom            iso9660        ro                0   0

Answer 4

Steps to mount a disk permanently.
Doing this will mount your disk during boot time.

0. Attach your disk manually once.
1. Goto /proc/mounts and /etc/mtab and look for your mount entry.
2. Copy the entry that you want to be mounted on boot.
3. Paste it at the end of /etc/fstab. /etc/fstab Contains entries that are mounted during boot.

You can even manually add your entry in /etc/fstab, but copying it from /proc/mounts or /etc/mtab makes sure that you not make any error or mistake in listing your mount point

more helpful links link 1 link 2