This gives you crucial information as to where a mountable partition is located. To do this check the map of your image with fdisk -l: # fdisk -l ArduinoOS_Redux.x86_64-0.0.XX.raw Disk ArduinoOS_Redux.x86_64-0.0.XX.raw: 3.2 GiB, 3478126592 bytes, 6793216 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x4e37b4f7 Device Boot Start End Sectors Size Id Type ArduinoOS_Redux.x86_64-0.0.XX.raw1 * 2048 6793215 6791168 3.2G 83 Linux As raw images can contain different partitions, you have to figure out which one you want to mount and where it is located on the “virtual” disk. Mounting raw images is a little different. You can’t actually touch or change anything because the ISO 9660 filesystem - the filesystem used in ISO images - is read only. Where image_mount_point is a directory you create specifically to mount the ISO, and image.iso is an ISO image file, say, a live CD image (Figure 3).įigure 3: You can mount an image file and access it like a partition.Īgain, notice that you can only explore an ISO image. In its simplest form, this option allows you to mount and explore an ISO or raw image like this: $ mkdir image_mount_point # mount -o loop image.iso image_mount_point You may be familiar with mount ‘s -o loop option. Plus, doing it the other way around is not elegant. See Figures 1 and 2.įigure 1: Before the first boot, GParted shows the image occupying 3.39GB on a 16GB USB thumb drive.įigure 2: After booting, the image has expended to occupy nearly the whole thumb drive. A vanilla raw image that weighs less than 4GB, like the example we’re using in this tutorial, will, if copied to a 16GB pen drive, be enormous when copied back. If you are making an image available to others, this is a problem. Images generated with SUSE Studio and other similar services contain scripts that automatically grow the partitions so they occupy the whole thumb-drive, for example. There are scripts that poke around the hardware and media and modify stuff depending on what they find. Why do it this way? Why not copy to a USB, boot it, modify whatever, and then copy from the USB back to a raw image? The reason is that first boots are usually different from other boots. raw file, but before making it available to all your friends and colleagues, you want to add in the latest Arduino IDE. With a bootable raw image on a thumbdrive, you can carry around a complete OS in your pocket. As they are read/writable, copied to a USB thumbdrive or SD card, they become “run ready”, so there’s no need to dump everything into RAM and lose all your changes at power off like with Live CDs/DVDs. Same goes for the default SUSE Studio images mentioned above, and a few other distros. Think of how you “install” Raspberry Pi’s Raspbian, for example: You simply dd the image file to an SD card. Raw image files are useful for several reasons. Although both are a byte per byte copy of block devices, and both can be recorded to read only or read/write media, ISO images do not contain a partition table and are read only, whereas RAW images can contain a complete table and are read/writable. ISO Imagesīefore we dig in any deeper, a few words on the differences between raw and ISO images. Well, yes, but there are several steps you have to follow to pull this off. Surely you can do all that by manipulating the disk image that SUSE Studio provides you with. “Installing” Arduino usually consists of downloading the zip file for your architecture, decompressing it in /home/// and creating a soft link to the arduino app itself from a bin/ directory on your $PATH. There must be a shortcut, right? After all, the Arduino IDE requires virtually no installation as such and very little in the way of dependencies. Packaging the Arduino IDE for openSUSE is perfectly possible, but it’s a whole new kettle of fish. Of course, you want the most recent version. However, the default package for Arduino that comes with openSUSE is quite old, and newer boards are not supported. You may want to have the Arduino IDE preinstalled. Maybe something like this (by the way, if you want to follow along with this tutorial, you may want to download that). You want an image they can burn to their own USB thumbdrives so they can use it at home or in the computer lab. Say you need a customized distro for the kids at your maker club. There is one serious caveat, however: If you want to add external packages that are not in the otherwise very comprehensive repositories, things can get complicated indeed. When you have designed your spin to your liking, you can download what’s known as a “raw image” that you can copy to a USB thumbdrive, and… Hey presto! You’ve got yourself a tailor-made distro on a stick! SUSE Studio is pretty awesome for building custom Linux spins.
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