Hi everybody,
I want to know whether exists an equivalent to Drivedroid app (android) in linux? it converts android smartphone to external cd rom using iso`s on phone storage.

I don't really understand what do you need, but iso files can be generated on linux and also can be booted using a VM.

thanks for reply, I know that but it is not on the same computer. drivedroid converts phone to an external usb cd rom .

From the homepage:
Drivedroid runs on an Android device and allows turning the device into a pendrive with several DVDROM images on it.

So you want software that allows turning a Linux computer into a pendrive? I doubt that it exists; it's kind of inconvenient to carry a PC with you compared to a phone or a pendrive.

you can mount any remote filesystem on linux and boot any file/image from that - using a VM. But probably better to copy it first to a local drive.
And also you can mount file[s] as a virtual CD on linux.
If I understand well DriveDroid is a solution in that [limited] environment, and actually on linux you can have much more possibilities.

But again, would be nice to explain what do you really want to achieve.

thanks for reply , but its not inconvenient carrying a little laptop .

thanks for reply, I mean turning a little laptop into a pendrive/usb cd rom . its not for vms , for example its for a PC without any OS. exactly what drivedroid can do.

It is possible using the gadget mass storage driver but only if the computer or device has an OTG or device USB port.

Embedded devices, some tablets I think and Android devices like your smartphone have OTG usb ports but have no idea which if any regular laptops have them.

So yes but only if you have the right hardware.

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thanks for reply, if my hardware is for example a raspberry pi , then I think I must use g_multi , do you think so?

The best I can think of is

CDemu, to emulate block devices from images ( .iso etc. )
serve the block devices over IP via iscsi

I have no idea if that would work
and if it does, probably not what @danuk wants since it is over network and not USB


another option might be
easy2boot ( awful website )

you can have a load of disk images on a drive ( pendrive, hdd )
boot it, select the image you want and easy2boot hacks the partition table and presents the selected image as the drive.

Very handy, all your CD/DVD rom images on one drive
it is like having a whole load of CD/DVDs and an external DVD-drive

would do away with the laptop entirely

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I don't know. Pi zeros have an OTG port and there are projects you can find on the internet to use them as a mass storage device that might provide those details.

thank you very much.

thank you very much . Mass Storage Gadget is probably what I need