Linux – Script to “remount” a partition (umount then mount)

linuxmountscripting

I'm doing some experiments with NTFS(-3G) and fstab. For every change I do to fstab, I need to issue:

sudo umount /mountpoint
sudo mount /mountpoint

To check the results. Since I'm doing a LOT of tests, it gets really annoying to issue the umount/mount combo every time.

Is there any way I could combine these 2 commands in a single remount script? Is there already any switch to mount that do that?

I'm using Ubuntu 10.10
All command-line parameters passed to the script must be "re-passed" to the mount command (so I can use -a, -t type, etc)
Preferably, only the last parameter should be passed to umount

Best Answer

In your shell (assuming bash or other compatible shell) run

function remount() { unmount "$1" && mount "$1"; }

now whenever you run remount /whatever, it'll do an unmount, then a mount.
This will expire if you close your shell. So if you want it to persist, put it in your .bashrc, .profile, or whatever applies to your case.

Related Solutions

Mounting – Recursive Umount After Rbind Mount

This worked for me correctly -- https://unix.stackexchange.com/a/264488/4319:

mount --rbind /dev /mnt/test
mount --make-rslave /mnt/test
umount -R /mnt/test

It was important to have the two first commands as two separate commands: do not combine --rbind and --make-rslave in one invocation of mount.

Without --make-rslave, the behavior was unwanted (and not successful):

umount -l would affect the original old mountpoints, too,
and umount -R would be affected by the busy (open) files under the original old mountpoints. (Very unexpected...)

Linux – what the difference between remount to umount/mount

man mount :

remount

Attempt to remount an already-mounted filesystem. This is commonly used to change the mount flags for a filesystem, especially to make a readonly filesystem writeable. It does not change device or mount point. The remount functionality follows the standard way how the mount command works with options from fstab. It means the mount command doesn't read fstab (or mtab) only when a device and dir are fully specified.

The remount option is used when the file system isn't currently in use to modify the mount option from ro to rw.

target is busy.

If the file system is already in use you can't umount it properly , you need to find the process which accessed your files (fuser -mu /path/ ) , killing the running process then unmounting the file.

Best Answer

Related Solutions

Mounting – Recursive Umount After Rbind Mount

Linux – what the difference between remount to umount/mount

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