Dmg Linux
Ubuntu is a common variant of Linux, complete with a user-friendly interface and full flexibility in customizing it via the Terminal window. Windows and Linux share the ability to open ISO files, which are similar to DMG files.
For example I have Apache Web server where Mac dmg file is located. I want to modify for every download adding specific readme file, depending on the region where download request is coming from. A special shell script can do this job, but before I need to verify all script steps manually. This article explains how to do it on Centos6 64-bit Linux.
Preparation steps:
1. Install ELRepo (Before installing ELRepo check the current version: http://elrepo.org/tiki/tiki-index.php):
# rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org # yum install https://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm |
2. Install hfs and hfsplus Apple file system
# yum install kmod-hfs # yum install kmod-hfsplus |
3. install dmg2img utility
Click 'Download' button located on the menu bar or you can 'Right click' & select the 'Download' option. open the photo album. Select the photos which you want to download. /one-drive-download-mac.html. You will see a checkbox at the top right corner when you mouse over the photos. You will be prompted to save the.zip file.
# yum install dmg2img |
Resolving problems with dmg2img installation.
4. install genisoimage
# yum install genisoimage |
After installation I rebooted my Linux device because it did not see Apple hfs and hfsplus Apple file system.
DMG modification:
Now we need some dmg file to play with. Let us download some, I selected Avast antivirus, you may used other:
curl -O https://install.avcdn.net/mac-av/10_9/AAFM/avast_security_online.dmg |
Next we need to convert dmg file to img:
# dmg2img avast_security_online.dmg avast_security_online.img dmg2img v1.6.2 is derived from dmg2iso by vu1tur ([email protected]) avast_security_online.dmg –> avast_security_online.img reading property list, 8326 bytes from address 15071232 … decompressing: opening partition 0 … 100.00% ok opening partition 1 … 100.00% ok opening partition 2 … 100.00% ok opening partition 3 … 100.00% ok opening partition 4 … 100.00% ok opening partition 5 … 100.00% ok opening partition 6 … 100.00% ok opening partition 7 … 100.00% ok Archive successfully decompressed as avast_security_online.img Image appears to have GUID Partition Table with 1 HFS+ partition. You should be able to mount it [as root] by: modprobe hfsplus |
Check result of conversion:
# ls -l avast_security_online* -rw-r–r– 1 root root 15080070 Mar 12 12:19 avast_security_online.dmg -rw-r–r– 1 root root 18284544 Mar 12 12:24 avast_security_online.img |
Create /mnt/dmg directory:
Dmg Linux Usb
# mkdir /mnt/dmg |
Mount converted avast_security_online.img to /mnt/dmg directory:
# mount -t hfsplus -o loop,offset=20480 avast_security_online.img /mnt/dmg |
Check content of/mnt/dmg directory after mounting:
# ls -l /mnt/dmg total 12520 -rw-r–r–. 1 506 games 12816864 Feb 25 08:26 Avast Security.pkg drwxr-xr-x. 1 506 games 3 Feb 25 08:26 com.avast.uninstall.app |
| Sometime mount produces the following error: “mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing codepage or helper program, or other error”. If hfsplus has been installed successfully, check offet and sizelimit values: Disk abc.img: 47 MB, 47226880 bytes, 92240 sectors # Start End Size Type Name recalculating output of fdisk, to get the same result as from parted: Now mount it successful: |
Create /tmp/dmg directory:
# mkdir /tmp/dmg |
Copy content of /mnt/dmg directory to /mnt/tmp directory, then copy your readme file to /tmp/dmg directory.
Check /tmp/dmg directory content
# ls /tmp/dmg Avast Security.pkg com.avast.uninstall.app readme.txt |
Create new dmg file from /tmp/dmg directory:
# genisoimage -V “AvastInstallation” -D -R -apple -no-pad -o newAvast.dmg /tmp/dmg |
Unmount /mnt/dmg
# umount /mnt/dmg |
Testing:
Download newAvast.dmg file on your Mac machine, doulbe click on the file and what you will see:
or check AvastInstallation volume:
# ls -l /Volumes/AvastInstallation/ total 25040 -rw-r–r– 1 root wheel 12816864 Mar 14 12:37 Avast Security.pkg drwxr-xr-x 3 root wheel 2048 Mar 14 12:37 com.avast.uninstall.app -rw-r–r– 1 root wheel 0 Mar 14 12:40 readme.txt |
File type: Mac OS X Disk Image
Open DMG File
The usage of the DMG file extension is in the context of a mountable disk image file which is generated by the Mac OS X Operating System platform. Once the file is opened, the system will mount it in a virtual disk located on the user's desktop.
This type of file is normally utilized for the distribution of software installation packages for the Macintosh computer system.
Prior to the introduction of this file format, the Mac environment utilized the IMG up until the introduction of the Mac OS 9. The Apple Disk Utility is the main application associated by users to this particular file type under the Macintosh platform and is bundled with the Mac OS X installation package.
Although not meant to be directly opened under the Microsoft Windows Operating System platform, the DMG format file can be accessed by Windows users by using some third party applications in the market. Basically, the DMG file extension can be compared to the EXE or ISO format of Windows and can even function as a complete virtual drive for the system.
The mimicking of physical CD drives is a workaround implemented by the system to address problems that may arise from CD requirements of some software programs including support for the efficient usage of an organization's resources.