Ubuntu Server › Whether you want to configure a simple file server or build a fifty thousand-node cloud, you can rely on Ubuntu Server and its five years of guaranteed free upgrades. Iso is a standard, dmg is often contains compressed items, where isos do not. To avoid the few rare cases in which a dmg behaves as an iso, it's best to just convert it to a known valid format. If you write the common dmgs (that contain compression) to a USB, many things do not handle them correctly.
Open DMG File on Linux
DMG files use Hierarchical File System (HFS) as a disk file system format. In order for your Linux machine to open DMG files it needs to support HFS and HFS+. To enable HFS and HFS+ support on your Linux machine you will need to install HFS tools and kernel modules.
Ubuntu
Below are instructions on how to install HFS and HFS+ and mount HFS+ drive on Ubuntu.
1) Install hfsprogs which enables operation with HFS and HFS+ on Linux via ports of mkfs and fsck.
sudo apt-get install hfsprogs
2) Mount or remount the HFS+ drive
sudo mount -t hfsplus -o force,rw /dev/sdXY /media/mntpoint
or
sudo mount -t hfsplus -o remount,force,rw /mount/point
3) If the drive is partially corrupted or was unmounted with an error run:
sudo fsck.hfsplus -f /dev/sdXY
CentOS
Below are instructions on how to mount HFS or HFS+ in CentOS:
Ubuntu Dmg File Download
1) Install hfs kernel modules and hfs+ tools:
yum install kmod-hfs
yum install hfsplus-tools
2) Mount or remount the HFS+ drive
sudo mount -t hfsplus -o force,rw /dev/sdXY /media/mntpoint
or
sudo mount -t hfsplus -o remount,force,rw /mount/point
3) If the drive is partially corrupted or was unmounted with an error run:
sudo fsck.hfsplus -f /dev/sdXY
With HFS and HFS+ enabled you are ready to mount your DMG file.
Following DMG partitioning schemes were tested to work with instructions below:
- Apple Partition Map
- CD/DVD (partitioned)
- CD/DVD (partitioned) with ISO data
- Hard disk
- Master Boot Record Partition Map
- No partition map
Below is a command to mount an image.dmg file using hfsplus file system:
sudo mount -t hfsplus image.dmg /mnt
Here -t hfsplus tells mount command to mount with HFS+ file system. The /mnt specifies a path to where the image will be mounted.
To unmount following command is needed:
sudo mount -t hfsplus image.dmg /mnt
This guide covers the verbatim copying of a DMG image to a USB thumb drive using only Linux (no need to find a Mac). If the DMG was intended to be bootable then the resulting USB will be bootable.
Convert to ISO
Linux doesn’t much care for DMG files. Sure, it’ll play nice with them. But we don’t just want to play nice. We want to copy a DMG image to a USB drive and keep it as verbatim as computationally possible. In order to do this, we’re first going to convert the image to a format that’s a little more universal: ISO.
We’re going to use dmg2img to convert the DMG to an ISO image. If you already have dmg2img, great. If not, install it using your distribution’s native package management system.
On Ubuntu, you’d do it like this:
Once you have dmg2img installed, begin converting the DMG file:
After a few minutes, you should have a second file called image.img. This file can be used like an ISO. All we have to do is change the extension. Use mv to do this:
Make sure you specified “image.img” and not “image.dmg”! Working with three different file extensions can get kind of confusing.
Ok, so we should now have a file called “image.iso” which is just “image.img” with a different extension.
Now we want to write “image.iso” to our USB drive. I used “lsblk” to figure out how the system was identifying my drive. The lsblk command lists all disks connected to the system. It’s usually pretty easy to figure out which disk is which based on their size. Just be sure you’re sure. This process is going to overwrite the target disk with the contents of our DMG image file. Any preexisting files on the target disk will be lost. As usual, make sure you have a proper backup.
Make sure the target drive isn’t mounted. Unmount the drive with your distribution’s GUI.
Or you could just unmount it from the terminal:
Most systems seem to mount external drives in /media. Sometimes the drive might be mounted in /mnt or elsewhere.
Write the ISO image to the USB drive like this:
Replace “X” with the appropriate letter. For example “/dev/sdb”. Be sure to use the drive directly and not a partition within the drive. For example, don’t use “/dev/sdb1”.
![Ubuntu Dmg File Ubuntu Dmg File](/uploads/1/3/4/3/134385244/555782314.jpg)
This will probably take a little while to complete. I’m using a Kingston DataTraveler DTSE9 and it took about 24 minutes 30 seconds to write 4.9GB.
Ubuntu Dmg File Free
Your new USB stick should now be bootable, assuming that was the intended purpose of the DMG.