What does only root can do that mean?

What does only root can do that mean?

The message “mount: only root can do that” comes from the mount command itself: it allows non-root users to only mount and unmount those filesystems that have the special mount option “user” in the /etc/fstab file. In effect, the non-root users can only run mount operations that have been pre-approved by root.

Can I unmount root?

Normally you cannot just unmount the real root filesystem; if you could do that, you would end up with a situation where you have no way to open any files (and no existing files open, because having any files open in the old root filesystem would prevent its unmounting).

What unmount means?

When you unmount it, the SD card disconnects from your device. If you don’t mount an SD card on your Android device, it won’t be readable by your device.

What is unmount filesystem?

The unmounting of a file system removes it from the file system mount point, and deletes the entry from the /etc/mnttab file. Some file system administration tasks cannot be performed on mounted file systems. It is a good idea to unmount a file system before doing a complete backup. …

How do I mount without root?

If the user wants to give any non-root user the privilege to mount a specific NFS mount, add the user option in the /etc/fstab entry on the client. Then any non-root user will have permission to mount that filesystem, using the /etc/fstab entry.

Does mount require root?

To be clear, the mount() system call always requires root. suid utilities can become root and allow non root users to mount, and if the mount command is installed suid, then it will do this based on the user flag in fstab.

How do you unmount a house?

there you can umount /home, if again get errors run sudo umount -fl /home . -f force and -l disconnect in lazy! WARNING: LOGGING IN TO A SYSTEM AS ROOT MAY CAUSE VERY SERIOUS TROUBLE. You need to logged in as root to be able to accomplish your task.

How do I shrink a root partition?

Reduce the size of root filesystem

1. First, boot the system into rescue mode.
2. Activate the logical volume to be reduced.
3. Reduce the size of the file system and logical volume on /dev/VolGroup00/LogVol00.
4. Finally reduce the size of the logical volume containing the root file system:

What happens when you unmount?

You should ALWAYS either unmount your SD card or power off your phone before removing your memory card. Unmounting the SD card does NOT result in a loss of data or anything saved on your SD card. It simply tells the phone to stop showing things from the memory card.

What is lazy unmount?

-l Lazy unmount. Detach the filesystem from the filesystem hierarchy now, and cleanup all references to the filesystem as soon as it is not busy anymore. This option allows a “busy” filesystem to be unmounted.